Comment 6 for bug 1625558

I think this is related to https://bugs.launchpad.net/tripleo/+bug/1633090 which is asking for the environment files that enable a particular nic configuration (such as single-nic-with-vlans mentioned above) composable (or in other words, automatically enable it for all roles when you do -e $tht/environments/net-single-nic-with-vlans.yaml

If we do that, can we close this, or are there additional examples needed?