AMQP support

[jackburridge]

Add support for an AMQP AMGI server

The best asyncio support is likely from aio-pika through the core pika library supports asyncio as well, which we could use without the additional dependency

RabbitMqContainer can be used for integration tests

Todo

• AMGI AMQP server
• AMQP receive
• AMQP send
• AMQP example
• AMQP entrypoint