CBQE-0: add priorities to tuq tests

Change-Id: I00f94777055d389d8fe5f7c65c22248362dd5f24
Reviewed-on: http://review.couchbase.org/33236
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Ketaki Gangal <ketakigangal@gmail.com>