Use the contrail vrouter api and create a vm instance for the port obj if not present
Merge pull request #14 from enovance/neutron_vif

Use the contrail vrouter api and create a vm instance for the port obj
Add code to disable ip sharing with multiple ports
Incorporate review comments from Doude
Merge pull request #15 from enovance/port_ip_collision

Add code to disable ip sharing with multiple ports