tenks-deploy.sh deploys a minimal virtualized baremetal test cluster
locally. It also adds it to the overcloud-base CI job. To make the new
CI job work, we need to configure the firewall on the test machine to
allow the baremetal machines to communicate with the openstack services.

Change-Id: I7487a2606cf0bac71c5c63db41b2b518a6f6398b
Depends-On: https://review.openstack.org/#/c/615939
Depends-On: https://review.openstack.org/#/c/618003
Story: 2004297
Task: 27850