1. Run tests Tunnelbroker tests (most important are `tunnelbroker_persist_tests` and `test_messages_order` )
2. Make sure priority works, do the following:
- declare queue
- send message A, B with priority `10`
- send message C with priority `1`
- send message D with priority `10`
- create consumer
- consume messages - order should be A, B, D, C