Deployed networks template
Deployed networks template

Add a template for deployed networks, pre-deployed
network info in DeployedNetworkEnvironment parameter.
Use templates for 'OS::TripleO::Network' in resource
registry.

Depends-On: https://review.opendev.org/753195
Depends-On: https://review.opendev.org/751875
Change-Id: Id42486b513bef74525c1aa7204de979704e06ace

openstack/tripleo-heat-templates,openstack/tripleo-heat-templates