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.
ISPN-5015 Add Hibernate session factory parameter info in 2LC docu
ISPN-5020 Create OSGi blueprint file for SoftIndexFileStore
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
Waiting for JGroups 3.6.1