Comment 1 for bug 1564946

@halcyondude suggested in #55:

    Do something similar to: redhat-openstack/khaleesi@0f5197f - This adds aliases to ssh.config.ansible to create/nuke SSH tunnels that map local ports --> :80 on the undercloud. Add one for overcloud (if deployed). This would make it simple for a new user (or anyone) to access the dashboard via a local port.

My take
The overcloud should be exposed to people other than the original developer. The ssh tunnel approach makes that hard to collaborate. Suggest that we add an inactive interface for the external network on the controller that can be activated after the deploy is completed.