ISPN-5004 Enhance ProtobufMetadataManagerMBean

* Move ProtobufMetadataManagerMBean to infinispan-remote-query-client module, unfortunatelly could not
  keep the same package so a deprecated copy of ProtobufMetadataManagerMBean exists in previous location
  too for backward compatibility

* Rename method: displayProtofile( ) --> getProtofile( )

* Add methods getProtofileNames, getProtofile, getFilesWithErrors, getFileErrors