MB-8729: memcached and bucket_engine for cccp

Change-Id: I94a7054358ab480752e186c8846d77b55d8d2daa
Reviewed-on: http://review.couchbase.org/29893
Tested-by: Trond Norbye <trond.norbye@gmail.com>
Reviewed-by: Philip Labee <philip@couchbase.com>
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Reviewed-by: abhinav dangeti <abhinav@couchbase.com>