CBQE-0: cleanup warmuptest after fixes

Change-Id: Ia51f8fcd503ecaa01a9f185eec65f5e527f92e73
Reviewed-on: http://review.couchbase.org/34893
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>