Add tempest workspace volume for tempest
Add tempest workspace volume for tempest

* It also set proper setype for tempest service directories
This will allow proper access from the containers without any new SELinux policy.

* /var/lib/tempest will be used for creating tempest workspace.

Change-Id: Iedd397784c8b8d1bb891272542bd242c0ea60340

dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates