Support amqps:// URIs in spring.rabbitmq.addresses

[markpollack]

If ampqs is used in the URI and no explicit port is declared, the port number 5671 will be used instead of 5672

Resolves #6401

[xyloman]

@markpollack thank you for performing this PR this is something that I have had on my list of things to contribute for some time. I know other in the community will greatly benefit from this update. 🎉

[mbhave]

There's some room for improvement here where if an amqps address is provided, we can set spring.rabbitmq.ssl.enabled to true. This would remove the need for the user to set spring.rabbitmq.ssl.enabled: true in addition to setting an amqps address.

[snicoll]

Good catch. I suppose we'd need to check that all adresses are either all using amqps or amqp. If the net effect of this PR is that users must set the URI and the SSL flag, I think we should reconsider this change to avoid that.

[wilkinsona]

I think we should determine whether or not to implicitly enable SSL based on the first address. This will align the behaviour with determining the host, port, etc that are set on the RabbitConnectionFactoryBean.

[snicoll]

Thank you Mark. As suggested by @mbhave, I've polished your proposal to automatically enable ssl support when amqps is detected. That way, you can have SSL configuration and just use it (or not) based on the actual address.