CBQE-0: updated upr_client api

Change-Id: I728c56c25aa4c244cb96d9027e344d361f600e0f
Reviewed-on: http://review.couchbase.org/38052
Reviewed-by: Tommie McAfee <tommie@couchbase.com>
Tested-by: Tommie McAfee <tommie@couchbase.com>