Automatic discovery of interface names

[josecastillolema]

It would be great if we could improve jetlag in a way where is not needed anymore to provide interface names, i.e.: bastion_lab_interface, controlplane_lab_interface, etc. Ideally this should be infered automatically based on the server type, as jetsky does, see this dict: https://github.com/redhat-performance/JetSki/blob/master/ansible-ipi-install/roles/bootstrap/defaults/main.yml