Remove hawt.io console and restore back to just the old console
[AMQ-4976] Revert addition of hawt.io console

Merge branch 'pr/6' into trunk
Removed test, it has been commented out and not run for over a year. See AMQ-4974
https://issues.apache.org/jira/browse/AMQ-4977

Don't increase the cache size for repeated pull commands for the same
destination + consumer combo since we only keep one instance in the map
at any given time.
Add missing license header
Commented out most test cases because of CI hangs.  See AMQ-4978
Removed. See AMQ-4972
https://issues.apache.org/jira/browse/AMQ-4970

Prevent multiple start / stop operations on a queue from having any
effect.