CBQE-1282 Avoid rebalance check when restart operation invovled

When we restart a node, we should not try to reblance the cluster
or monitor rebalance progress of the cluster.
Also after autofailover, we should reset the autofailover settings

Change-Id: Ib8d545c6b958d208c4dc5e785afa6e77ddb9058a
Reviewed-on: http://review.couchbase.org/26624
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Chisheng Hong <chisheng@couchbase.com>