This code adds an extension for policy-id in a security group.
when this feature is enabled (new nsxv config: use_nsx_policies):
- Each security group will be linked to an nsx policy.
- No rules will be added to any of the security groups
- Only admin can edit security groups (depending on the policy.json)
- the default security group will be using the new nsx.ini config
default_policy_id
Change-Id: Iad5e90245c2f70ed88f65f0c5e6ec46cb2eedbbc
5c1f2f5b30