pvfs should use orangefs rpms #658

orangefs is packaged for Fedora and EPEL7, so presumably the rpms should be installed, rather than building from source. It's not in EPEL6, if that's still relevant, but the build I used is in https://copr.fedorainfracloud.org/coprs/loveshack/orangefs though it's old and might need updating.
I can look at that when I come back from holiday, but it's not clear to me how best to re-write the ansible stuff. Would it be best basically to start again with EL and Debian components structured like other things?