add rabbitmq-3.3

Add a modern RabbitMQ
Can we do the "one line" version to be consistent here please?

```ruby
version("2.7.1") { source md5: "34a5f9fb6f22e6681092443fcc80324f"  }
version("3.3.4") { source md5: "61a3822f3af0aaa30da7230dccb17067"  }
```