CBQE-996: do not put keys with ttl in ccqueues

Change-Id: Ib2226b39e0c21ae4678654c534f1a8fb48b3bd59
Reviewed-on: http://review.couchbase.org/24334
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Chisheng Hong <chisheng@couchbase.com>
Tested-by: Chisheng Hong <chisheng@couchbase.com>