CBQE-0: adding hard failover case graceful=False

Change-Id: I6e8cac34ea2dc3ee93b39042809f946323665986
Reviewed-on: http://review.couchbase.org/36774
Reviewed-by: Parag Agarwal <agarwal.parag@gmail.com>
Tested-by: Parag Agarwal <agarwal.parag@gmail.com>