OZ supports new Fedora releases. There's no real change between 20 and 22
    
    except that non x86 needs at least version 22. We've been using this
    version without issue for some time on non x86 composees. Bring rawhide
    up to this so we're the same.
    
    Signed-off-by: Peter Robinson <pbrobinson@fedoraproject.org>