ISPN-4900 Split-brain: cancelled ST results in missing data

Reset the rebalance confirmation collector when entering degraded mode
ISPN-4934 Upgrade to protostream-2.0.1.Final
ISPN-4925 Enhance documentation on Spring Integration
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.