Fixes for Fedora 19

Starting the distro version of RabbitMQ failed on Fedora 19 because it doesn't have init.d scripts anymore. Since the setsid modifications that were done to the rabbitmq service resource seem to be Debian-specific, I've switched back to the default Redhat provider in the rhel/fedora case.

I tested with both the distro and regular versions, and found out the source package attribute for the regular one wasn't set for Fedora, so fixed that as well.

Finally, I've bumped RabbitMQ to the latest version.

I haven't made a ticket for this yet since the opscode.com subdomains seem to be down at the moment, will do that later.