ISPN-5011 CacheManager not stopping when search factory not initialized
[ISPN-4645] Many XSD default values do not match the defaults from the
corresponding configuration builder

Updated core XSD for state transfer chunk size property default value
Remove unused imports
Make some classes final
Fix a TODO in ProtobufWrapperIndexingTest
Replace deprecated usages of Lucene version constants (Version.LUCENE_4_10_1 -> Version.LATEST)
ISPN-5018 Add test for protobuf marshalling of primitives with and without compat mode enabled
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
ISPN-4975 Cross site state transfer - status of push gets stuck at "SENDING" after being cancelled

* clean the collector and add the CANCELED status
ISPN-4444 After state transfer, a node is able to read keys it no longer owns from its data container

* mark the keys stored as L1
* this avoid read the keys that are going to be invalidated during the ST
ISPN-5010 Configure event sender as an async Listener

* Ordering is only guaranteed as long as the async listener executor
is configured with 1 thread, which is the default.
* By using async listener, construction of the event and sending it
is taken out of the critical path of the Hot Rod client request.
ISPN-5010 Batch events in queue and flush with time and size triggers