Log Message:
Update net/rabbitmq to 3.5.6

- Erlang 18.1 compatibility.
- Prevent EACCESS errors on Windows when queue journal is cleared.
- When multiple authorization backends are used, user tags from all
  of them should be preserved.
- Force a (per-queue, not global) GC when a queue pages messages
  to disk.
- MQTT Plugin: Queues used by QoS 1 subscriptions are no longer
  deleted when the only subscriber disconnects.
- STOMP Plugin: Trailing new line character now can be optional.