MB-100: bump client ops for mixed dgm testcases

Change-Id: Ie9579098c7c5bae4b77b6c1bf5498e62ffb2c876
Reviewed-on: http://review.couchbase.org/27325
Reviewed-by: Ronnie Sun <ronnie@couchbase.com>
Tested-by: Ronnie Sun <ronnie@couchbase.com>