Call ConnectionState.update when connection to cassandra breaks
Change server list in call to ConnectionState.update for zookeeper to actually have list of serers

Closes-Bug: 1365944

Change-Id: Iee8b119727228928df069b41b1f513f53e79a8f3
Merge "Call ConnectionState.update when connection to cassandra breaks Change server list in call to ConnectionState.update for zookeeper to actually have list of serers"