Added cluster states transition logging

* Needed for debugging purposes in case of huge amout of nodes provisioning

Change-Id: Ib18214b6bd2c342c4d03c0e6f28ee631efa267f6
(cherry picked from commit b4f8f932125b2a313b902d255c7f7b66ba216976)
Merge "Added cluster states transition logging" into stable/0.2