Remove Fedora related code

Fedora is no longer supported by Origin and was obviously never supported by OSE so lets excise the Fedora
specific code paths to simplify our code base.
Remove all use of params subclass that point to items provided in RHEL6

I've left in scl related params as I can envision those possibly
changing the future. The rest all point to RHEL6 items that I think we
can be sure won't change.
Merge pull request #353 from sdodson/fedora_cleanup

Remove Fedora related code