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.
Added test for ISPN-4637 that checks whether the HotRodServer returns an error when trying to register a ClientListener which specifies a non-existing converterFactory.