Fixes heat resource name for Internal API Network

Fixes heat resource name for Internal API Network

With the dynamic Jinja2 rendering for networks, the heat resource for
Internal API network was accidentally being renamed to:
OS::TripleO::Network::Internal

when it should be the same as previous versions:
OS::TripleO::Network::InternalApi

This patch removes the 'compat_name' which was overriding the network
name for rendering the resource. This patch also removes the
compat_name functionality from the network/networks.j2.yaml file
since it is no longer needed.

Closes-Bug: 1718764

Change-Id: If756cddd91933edb303cc056515d98b941a3eb14
Signed-off-by: Tim Rozet <trozet@redhat.com>
(cherry picked from commit 97244b942d29d2b5acd7a3eb07acdba0d9b99677)