CBQE-2086: Test cases to add customer usecases.

Change-Id: I0a58e24c54b2ab08ce7f1ca41947bf5dad21ac15
Reviewed-on: http://review.couchbase.org/40021
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Ketaki Gangal <ketakigangal@gmail.com>