Invalidation mode needs a proper key partitioner

Caches in invalidation mode used to do everything on the local node and only broadcast an invalidation command to all the members. ISPN-10029 changed this, and now transactional invalidation caches acquire locks for affected keys on the primary owners.

Unfortunately KeyPartitionerFactory constructs a SingleSegmentKeyPartitioner in invalidation mode, so there is only one primary owner for all the keys.