ISPN-4643 Make sure EntryIterator doesn't return expired entries
ISPN-4821 RHQ operation 'Upload Proto Schemas' no longer works due to changes introduced by ISPN-4357
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.