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-4757 Remote event filter/converter callbacks can use raw data

* It enables filter/converters to work with raw data.
* When using raw data, filter/converter factory parameters provided
by the user are not unmarshalled.
* When using raw data, custom event is flagged so that the client
does not attempt to marshall it.
* Such changes require protocol changes, so added Hot Rod
protocol 2.1.