Policy does not support dhcp for infra segments yet, so support is
done on manager via passthough API. Same appliance is assumed.
Not covered here (will come as follow up):
- subnet update
- nsx cleanup
Change-Id: I9a64524edd80b1830c5b3dba2c63c087fe46a169
Depends-on: I47a1ec1994808f9ed8ebb00bbcc2bbe0a497a146