Add StackForge Libra tarball jobs.
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 <635fc31d01fa593720982fa0568e87170cedbe2c@gmail.com>
Approved: Monty Taylor <37c07a49ee3d5191376d758eb1d8298b34456b8e@inaugust.com>
Reviewed-by: Monty Taylor <37c07a49ee3d5191376d758eb1d8298b34456b8e@inaugust.com>
Tested-by: Jenkins

coolsvap/project-config,Tesora/tesora-project-config,citrix-openstack/project-config,open-switch/infra_project-config,noorul/os-project-config,openstack-infra/project-config,noorul/os-project-config,anbangr/osci-project-config,Tesora/tesora-project-config,anbangr/osci-project-config,coolsvap/project-config,osrg/project-config,osrg/project-config,openstack-infra/project-config,citrix-openstack/project-config,open-switch/infra_project-config,dongwenjuan/project-config,dongwenjuan/project-config