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.
Reformat to remove tabs
ISPN-4017 Map/Reduce functions should filter expired entries