Add some tweaks to make it work out-of-the-box

When I started off, it didn't work. I did some digging around and figured you might have a customized RabbitMQ broker configuration.

I edited application.properties so it works with a default installation of rabbit (I use brew install rabbitmq).

I also adjusted RabbitTest to it was optional. If you switch it off by altering the profile, it won't blow up. It just prints out that RabbitTest isn't done.