Comment 2 for bug 1163569

Diagram is here
https://docs.google.com/presentation/d/15mpiFyilGvHFEEOw1Ytv2uSb80nW0KjEBRlHI4qOO8g/edit#slide=id.gb876186f_05

tap for lbaas is directly connected to the openvswitch, so we need similar driver as OVSHybrid stuff