CBQE-0 ::  fix failures in failover tests

Change-Id: I78e5ca455badd92bbc3559d01dd9993a5ca039d4
Reviewed-on: http://review.couchbase.org/38726
Reviewed-by: Parag Agarwal <agarwal.parag@gmail.com>
Tested-by: Parag Agarwal <agarwal.parag@gmail.com>