NetworkModel is intended as a read-only view on the network model.
This includes Networks, Nics, Ip address, PhysicalNetwork, NetworkOfferings, etc
The code in configure() and start() is used to support queries on the network model which is now the responsibility of the NetworkModel service
Network-refactor: Fix tests so that they get injected with the required NetworkModel mock
Signed-off-by: Chiradeep Vittal <chiradeep@apache.org>
