fix(gofeatureflag): Fix NPE when error code is not set in the API response

[thomaspoignant]

This PR

Fix NPE when error code is not set in the API response

java.lang.NullPointerException: Name is null
	at java.base/java.lang.Enum.valueOf(Enum.java:271) ~[?:?]
	at dev.openfeature.sdk.ErrorCode.valueOf(ErrorCode.java:3) ~[sdk-1.8.0.jar:?]
	at dev.openfeature.contrib.providers.gofeatureflag.controller.GoFeatureFlagController.mapErrorCode(GoFeatureFlagController.java:306) ~[classes/:?]
	at dev.openfeature.contrib.providers.gofeatureflag.controller.GoFeatureFlagController.evaluateFlag(GoFeatureFlagController.java:186) ~[classes/:?]
	at dev.openfeature.contrib.providers.gofeatureflag.GoFeatureFlagProvider.getEvaluation(GoFeatureFlagProvider.java:218) ~[classes/:?]
	at dev.openfeature.contrib.providers.gofeatureflag.GoFeatureFlagProvider.getBooleanEvaluation(GoFeatureFlagProvider.java:80) ~[classes/:?]
	at dev.openfeature.sdk.OpenFeatureClient.createProviderEvaluation(OpenFeatureClient.java:180) ~[sdk-1.8.0.jar:?]
	at dev.openfeature.sdk.OpenFeatureClient.evaluateFlag(OpenFeatureClient.java:123) ~[sdk-1.8.0.jar:?]
	at dev.openfeature.sdk.OpenFeatureClient.getBooleanDetails(OpenFeatureClient.java:223) ~[sdk-1.8.0.jar:?]
	at dev.openfeature.sdk.OpenFeatureClient.getBooleanDetails(OpenFeatureClient.java:217) ~[sdk-1.8.0.jar:?]
	at dev.openfeature.contrib.providers.gofeatureflag.GoFeatureFlagProviderTest.should_resolve_a_valid_boolean_flag_with_TARGETING_MATCH_reason_without_error_code_in_payload(GoFeatureFlagProviderTest.java:326) ~[test-classes/:?]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
	at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[?:?]
	at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:728) ~[junit-platform-commons-1.10.2.jar:1.10.2]
	at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:156) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:147) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:86) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.lambda$invoke$0(InterceptingExecutableInvoker.java:93) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:92) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:86) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$7(TestMethodTestDescriptor.java:218) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:214) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:139) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:69) ~[junit-jupiter-engine-5.10.2.jar:5.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[?:?]
	at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[?:?]
	at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54) ~[junit-platform-engine-1.10.2.jar:1.10.2]
	at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:147) ~[junit-platform-launcher-1.9.0.jar:1.9.0]
	at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:127) ~[junit-platform-launcher-1.9.0.jar:1.9.0]
	at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:90) ~[junit-platform-launcher-1.9.0.jar:1.9.0]
	at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:55) ~[junit-platform-launcher-1.9.0.jar:1.9.0]
	at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:102) [junit-platform-launcher-1.9.0.jar:1.9.0]
	at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:54) [junit-platform-launcher-1.9.0.jar:1.9.0]
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114) [junit-platform-launcher-1.9.0.jar:1.9.0]
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86) [junit-platform-launcher-1.9.0.jar:1.9.0]
	at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86) [junit-platform-launcher-1.9.0.jar:1.9.0]
	at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:53) [junit-platform-launcher-1.9.0.jar:1.9.0]
	at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:57) [junit5-rt.jar:?]
	at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38) [junit-rt.jar:?]
	at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11) [idea_rt.jar:?]
	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35) [junit-rt.jar:?]
	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:232) [junit-rt.jar:?]
	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:55) [junit-rt.jar:?]

[thomaspoignant]

CI is failing because of flagd error.

[toddbaert]

There was actually a number of failures because due to issues with actions last week, a couple PRs got through without the CI running, including a PMD update which generated errors. Fixed upstream: #856