CBQE-2304 add cli cluster-wide collectinfo tests

Change-Id: Ieb35454827c68cb3f32788fc2be3216c055c408e
Reviewed-on: http://review.couchbase.org/40358
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>