Description of problem:
The apache config file that exposes the yum repo created for rhn mirroring uses outdated configuration in the "Directory" section.

This causes clients to always receive a 403 Forbidden error when trying to access the yum repo.


To reproduce you would need to configure one appliance to pull updates from a valid subscription (subscription manager credentials should work fine) and enable the "RHN Mirror" role, which should fetch all the rpms from the selected repos needed for updating cfme-appliance and create a repo at `/repo` on the appliance.

Then add a second appliance to the region which should (eventually) subscribe "by proxy" to the rhn mirror appliance, but this process fails with a 403 when trying to access the repo.

This can be fixed by changing the permissions in the apache config for the repo virtual host from:
    Order allow,deny
    Allow from all
to:
    Require all granted

This fixes the issue.

I'm marking this as low severity because apache was updated in version 5.5 so it seems like this may not be a particularly in-demand feature. If it is more work to maintain than it is useful maybe we should remove it entirely? This possibility was originally raised as https://bugzilla.redhat.com/show_bug.cgi?id=1388951

Thoughts?