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-4638 Add ability to remove filter/converter factories

* Extension manager service should allow for filter/converter factories
to be removed when their undeployed (via their service stop() method).
* Extension manager service should allow for Hot Rod servers to be
removed when their removed (via their service stop() method).