CBQE-1168: reduce # of trips to object cache

looks like we are doing some unnecessary gets that can cause contention among distributed workers
and generate errors about "operation in progress"

Change-Id: I33b2230df881b294a113cee25be13dde350ba9a1
Reviewed-on: http://review.couchbase.org/25327
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Tommie McAfee <tommie@couchbase.com>