Add a default file for network data and vip data to
use with network-data-v2.
The network data is an empty list, i.e no network
isolation is the default.
The default vip data file keeps one entry for the
ctlplane network, which is the only Virtual IP in
the no network isolation scenarios.
Related-Blueprint: blueprint network-data-v2-ports
Change-Id: Ia50435c0560ed76791d1859612f625a1b776a8b2