CBQE-0:fix failing false alarm for data loss

Change-Id: I3adeeb055a92c69207be85e5e64893e4c631b3a8
Reviewed-on: http://review.couchbase.org/40639
Reviewed-by: Parag Agarwal <agarwal.parag@gmail.com>
Tested-by: Parag Agarwal <agarwal.parag@gmail.com>