Ignore facter error when fetching repo
Ignore facter error when fetching repo

Even though a repo is set with skip_if_unavailable=True,
Facter logs "Error:..." and then "Ignoring repositories...".
We need to add this regexp to ignored list.

Note: if repo should not be skipped if unavailable, dnf
would have raised error before Facter run.

Change-Id: Id2a3c27d8afb4a1d0e852a70e5a9ccd07e485399

stackforge/packstack,stackforge/packstack,fr34k8/packstack,fr34k8/packstack,mahak/packstack,stackforge/packstack,mahak/packstack,fr34k8/packstack,mahak/packstack