os-net-config has to provide path /usr/libexec/os-refresh-config/configure.d/20-os-net-config instead of creating it in tripleo-image-elements
Bob, mind taking a look?
https://review.openstack.org/#/c/470017/ removes the os-net-config element from t-h-t and installs the tool as a standard package.
Moving this to OSP-14.