Queues returned as json

Used for DevOps to see what's going on in the queues
an example request would be
```sh
curl -u bypassname:bypassword http://bypasslane.com/admin/dj_mon/dj_reports/queues.json
```

Response would be
```json
{
  "total":1,
  "queues":
  [
    {
      "queue":"Reporting",
      "count":1
    }
  ]
}
```