Bz1127954 amqp default port

I've waffled on this one a bit.  Originally, I thought it would be a good idea to default to assume AMQP over SSL.  However in practice, that's proving to be the wrong choice.

When setting up AMQP to use SSL, several steps are involved including copying ssl certs from the AMQP server over to the ManageIQ appliance.  Defaulting to the SSL AMQP port assumes that the user is going to take these steps.  It's better to assume non-ssl, and then include changing the default AMQP port number
part of the steps for configuring AMQP to use SSL in the appliance.

With this change, the default port value in the AMQP event monitors and the default worker settings assume non-ssl for AMPQ.

https://bugzilla.redhat.com/show_bug.cgi?id=1127954
Agreed, I guess my point is that if your code is very aware that the default could be either 5671 or 5672 going forward, it's fine.  From past experience, it's better to force this change once instead of trying to deal with unneeded complexity.   It might make sense to use a migration to change it to 5672 to ensure the code is as simple as possible and then make sure we document this change in the release notes.  At this point, how many people would have changed their configuration as they really wanted 5671 (ssl)?