The tripleo_compute_node is a "meta" role that imports the compute node
standalone playbooks for the purposes of molecule testing. The molecule
default scenario executes the standalone playbooks against a podman in
podman container with systemd as the process, in order to simulate a
compute node.
Change-Id: I14408ad4d2e4fb4ae265a105af18a876158200dc
Signed-off-by: James Slagle <jslagle@redhat.com>