CBQE-2304 add cancel tests to cluster wide collectinfo tests

Change-Id: I11a14462208acf9fb14a9de39fb81d1bf5ff6626
Reviewed-on: http://review.couchbase.org/39586
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>