The undercloud needs the External network for the external VIP
address. It uses the _from_pool template creating a fake neutron
port.
Other networks are not required, and should be removed to optimize
the number of heat resources and plan rendering.
NOTE: Skips validation of network_data_undercloud.yaml against
network_data.yaml, as is already done to openshift and routed
networks networks data examples.
Related Bug: #1809313
Change-Id: Ib11a134df93e59947168b40bc71fb1da9172d4ac
c1116e59c1