CBQE-0: put ui test under separate package

Change-Id: Ia763309541bedfb0c88d8bec31296a7a81b8a744
Reviewed-on: http://review.couchbase.org/41731
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Meenakshi Goel <meenakshi.goel@globallogic.com>