[ISSUE] #PR:4356 dubbo 2.7.2 do not contain "dubbo-serialization-protobuf-json" module

[vio-lin]

• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: 2.7.2
• Operating System version: Win7
• Java version: jdk8

Steps to reproduce this issue

1. start dubbo service with google-Protobuf serialization
2. invoke service with generic reference
3. get response

Pls. provide [GitHub address] to reproduce this issue.

Expected Result

server return right response

Actual Result

Caused by: org.apache.dubbo.remoting.RemotingException: org.apache.dubbo.rpc.RpcException: Deserialize argument failed.
org.apache.dubbo.rpc.RpcException: Deserialize argument failed.
	at org.apache.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:129)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:82)
	at org.apache.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:38)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:82)
	at org.apache.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:41)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:82)
	at com.ctrip.framework.cdubbo.internal.health.HealthCheckFilter.invoke(HealthCheckFilter.java:74)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:82)
	at com.ctrip.framework.cdubbo.internal.metadata.MetadataFilter.invoke(MetadataFilter.java:41)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:82)
	at com.ctrip.framework.cdubbo.internal.delegate.server.CDubboServerInvoker.invoke(CDubboServerInvoker.java:66)
	at com.ctrip.framework.cdubbo.internal.filter.CatProviderFilter.invoke(CatProviderFilter.java:28)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:82)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$CallbackRegistrationInvoker.invoke(ProtocolFilterWrapper.java:150)
	at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:152)
	at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:102)
	at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:193)
	at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:51)
	at com.ctrip.framework.cdubbo.internal.delegate.CDubboChannelHandlerDelegate.doReceivedRequest(CDubboChannelHandlerDelegate.java:108)
	at com.ctrip.framework.cdubbo.internal.delegate.CDubboChannelHandlerDelegate.received(CDubboChannelHandlerDelegate.java:66)
	at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: No such extension org.apache.dubbo.common.serialize.Serialization by name protobuf-json
	at org.apache.dubbo.common.extension.ExtensionLoader.findException(ExtensionLoader.java:520)
	at org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:527)
	at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:351)
	at org.apache.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:126)
	... 23 more

	at org.apache.dubbo.remoting.exchange.support.DefaultFuture.doReceived(DefaultFuture.java:191)
	at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:153)
	at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:141)
	at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleResponse(HeaderExchangeHandler.java:62)
	at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:199)
	at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:51)
	at com.ctrip.framework.cdubbo.internal.delegate.CDubboChannelHandlerDelegate.received(CDubboChannelHandlerDelegate.java:69)
	at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)