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 for backward compatibility

* Rename method: displayProtofile( ) --> getProtofile( )  

* Add methods getProtofileNames, getProtofile, getFilesWithErrors, getFileErrors

Jira: https://issues.jboss.org/browse/ISPN-5004
        https://issues.jboss.org/browse/ISPN-5018