ISPN-4648 Log rebalancing messages to specific category
ISPN-4109 Document API changes for Infinispan 7 Upgrade guide

* Added upgrade to 7.0 from 6.0 section
* Detail loader/writer changes and package refactoring for filters
ISPN-4654 AND over range queries does not work (indexless query)

Some subscription gets mistakenly suspended.
ISPN-4474 ISPN-4473 Get remote events working in compatibility mode

* Fixes both ClassCastExceptions reported in these jiras.
* Adds remote event compatibility tests.
* Refactored remote event assertion code to be sharable between the
Hot Rod client tests and the compatibility tests.