Commit issue with trying to use endure on Memcached buckets.

Change-Id: Idc56abc021c6111615d30f472c2b8ec38e4745dd
Reviewed-on: http://review.couchbase.org/24038
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>