Applied feedback:
* Renamed `action.replication.validate_quorum` to `action.replication.validate_write_consistency`
* In test cluster `action.replication.validate_quorum` is set randomly (to false or true randomly)
* Changed info log statement into debug log statement
* Simplified how validate_consistency is serialized in the various write based requests
* Split ackIndexing test into a variant without replicas and 2 or more replicas