ISPN-4505 Lucene Directory polishing
ISPN-4505 Now using @Override for methods which couldn't be marked properly before
ISPN-4505 Document the fact we dropped compatibility with older Lucene versions
ISPN-4278 Add QOP support to the HotRod SASL implementation
Change ReplicatedCHFactory to only replace leavers in updateMembers()

Uneven primary ownership should be dealt with in rebalance() only.
Delegate the isBalanced() check in DefaultRebalancePolicy to the CH factory

Allows waitForRehashToComplete() to work even if the CH factory allocated
less than numOwners owners to each segment.