Merge changes from topic 'netconf-clustering'

Merge changes from topic 'netconf-clustering'

* changes:
  Move mount point registration after schema resolution
  Cluster schema resolution pipeline
  Clustered sources resolution
  Change onNodeUpdated to first cleanup previous state
  Use normal identify messages first
  Use lock in topology node writer
  Prevent NPE's on failures
  RemoteDeviceDataBroker proxy