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
Revert "Revert rebalancing per cache"

This reverts commit 8cbba22ae625c7dd3e8f5ff389b71f4b49aec2b4.