- When network port security is set to True, ensure the same IP
is not used for multiple ports
- Extend checks for netork port security to all ports, not only
ports with a nova compute device_id
- When creating or updating a port, perform checks if port security
is enabled for the network or the flag for allowing multiple
addresses is unset.
Change-Id: I5d81257b55730d4544537bb269030ec7f1a277c1