CBQE-0: remove ClusterStatus in cacheClean

previously this wasn't removed from memory because
there were cases when orchestrator didn't match
CLUSTER_IP if test was restarted in the middle of a run.
That option is still available if worker is started without -I app.init

Change-Id: Id87406940741574abb527bb5ac9a57d4de536b8a
Reviewed-on: http://review.couchbase.org/30632
Reviewed-by: Tommie McAfee <tommie@couchbase.com>
Tested-by: Tommie McAfee <tommie@couchbase.com>