BZ #1056383 - Foreman Controller's swift proxy no longer runs ...

https://bugzilla.redhat.com/show_bug.cgi?id=1056383

Build the ringbuilder files on the proxy if no devices exist on its
ring files yet.
Merge pull request #114 from cwolferh/bz1056383_swift_ringbuilder_on_proxy

 BZ #1056383 - Foreman Controller's swift proxy no longer runs ...