Add OS-refresh-config.

Change-Id: I71105d72dc7a4d8b5fcf404cc33f54ce124903bf
Reviewed-on: https://review.openstack.org/26810
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Approved: Monty Taylor <mordred@inaugust.com>
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Tested-by: Jenkins
Add StackForge Libra tarball jobs.

PBR was just integrated into Libra, so we'd like to take
advantage of that.

Change-Id: I5b1e54ffb28324c1a06691300d1963f74ad9974b
Reviewed-on: https://review.openstack.org/26521
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: Monty Taylor <mordred@inaugust.com>
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Tested-by: Jenkins