CBQE-0 :: fix test case for max buckets with false alarms

Change-Id: Ie7be7fadc75fb3b00f25481793901bf27ea142cb
Reviewed-on: http://review.couchbase.org/41162
Reviewed-by: Parag Agarwal <agarwal.parag@gmail.com>
Tested-by: Parag Agarwal <agarwal.parag@gmail.com>