Remove the --gtest_filter=${porttest_filter} option for porttest

When ${porttest_filter} is an empty string, no tests from porttest are
run. ${porttest_filter} is never set in OMR so it will always be an
empty string. Also, --gtest_filter=${porttest_filter} conflicts with
the GTEST_FILTER environment variable used by omrbuild.groovy. To avoid
the conflict and correctly run porttest, the --gtest_filter=${porttest_filter}
option is removed. porttest should consistently rely upon the GTEST_FILTER
environment variable.

Fixes: eclipse#6486

Signed-off-by: Babneet Singh <[email protected]>

fvtest/porttest/CMakeLists.txt

@@ -1,5 +1,5 @@
 ###############################################################################
-# Copyright (c) 2017, 2021 IBM Corp. and others
+# Copyright (c) 2017, 2022 IBM Corp. and others
 #
 # This program and the accompanying materials are made available under
 # the terms of the Eclipse Public License 2.0 which accompanies this
@@ -165,7 +165,7 @@ endif()
 if (NOT (OMR_OS_AIX OR OMR_OS_ZOS OR CMAKE_CROSSCOMPILING))
 	omr_add_test(
 		NAME porttest
-		COMMAND $<TARGET_FILE:omrporttest> --gtest_output=xml:${CMAKE_CURRENT_BINARY_DIR}/omrporttest-results.xml --gtest_filter=${porttest_filter}
+		COMMAND $<TARGET_FILE:omrporttest> --gtest_output=xml:${CMAKE_CURRENT_BINARY_DIR}/omrporttest-results.xml
 	)
 endif()