CBQE-2163:: Add Support to dynamically change UPR and VBucket configs

Change-Id: I84f012c81a57c616b00be0260c1553e9ec450af9
Reviewed-on: http://review.couchbase.org/35093
Reviewed-by: Tommie McAfee <tommie@couchbase.com>
Reviewed-by: Parag Agarwal <agarwal.parag@gmail.com>
Tested-by: Parag Agarwal <agarwal.parag@gmail.com>