CBQE-0 add printout result when checking status of cwc couchbase cli

Change-Id: Ice2e065c7ea68509b417e9b87d9395ef07b9d7ce
Reviewed-on: http://review.couchbase.org/40547
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>