InternalApi heat resource renamed to Internal

[Tim Rozet]

With the new way of dynamically generating networks via the network_data.yaml file:
https://github.com/openstack/tripleo-heat-templates/blob/master/network_data.yaml

The heat resource OS::Tripleo::Network::InternalApi has been renamed to OS::Tripleo::Network::Internal. This breaks backwards compatibility when using previous heat templates with resource registry entries that override that resource. Such as:

resource_registry:
  OS::TripleO::Network::External: |-
     /usr/share/openstack-tripleo-heat-templates/network/external.yaml
  OS::TripleO::Network::InternalApi: OS::Heat::None

The cause of this renaming is due to InternalApi network having compat_name:
https://github.com/openstack/tripleo-heat-templates/blob/master/network_data.yaml#L61

As it is used to create the resource registry via j2:
https://github.com/openstack/tripleo-heat-templates/blob/stable/pike/network/networks.j2.yaml#L7

By removing compat_name for InternalApi network, the problem is fixed.

[Tim Rozet (trozet)]

Accidentally filed this twice. Dupe of 1718764