CBQE-1338 add more warmup test for mac test

Change-Id: I54a5efa2e696d065ad7dbbca2d4abcb0fbff918b
Reviewed-on: http://review.couchbase.org/26940
Reviewed-by: Chisheng Hong <chisheng@couchbase.com>
Tested-by: Chisheng Hong <chisheng@couchbase.com>