ISPN-4490 Members can miss the rebalance cancellation on coordinator change

Simulate the rebalance cancellation in StateTransferManagerImpl.
ISPN-4496 EncryptProtocolIT shouldn't check passwords via JMX
Replace ignore tests with empty test to avoid false alarms
ISPN-3729 Minimize the number of moved segments for SyncConsistentHashFactory

Based on the original consistent hashing paper, the
NewSyncConsistentHashFactory algorithm doesn't move any segments at all.