[REQUEST] API to return an overview of all deadletter queues

[jonyeezs]

I would like to have a http rest call that will get list of deadletters, its count and url.

Be useful to have bots that can retrieve this information.

Have smarter monitors that can decipher what is happening.

[
 {
   type: 'topic/queue',
   name: 'handler name',
   count: 'int number of deadletters',
   url: 'http://link.to.click/#/topic/so.i.can.see.my.queue
 }
,
...
]

nice-to-have: time of last queued deadletter