This patch adds a driver for FWaaS V2 support in the NSX-V plugin.
It supports setting firewall rules per router interface port on the router
edge firewall.
In addition, the FWaaS TVD driver will now support NSX-V as well.
The driver code is a combination of the NSX-V3 FWaas-V2 code, and the old
NSX-V FWaaS-V1 code that is being deleted.
Change-Id: Iacc7eaff0c70b68156516008cf0277c154edd76b
a36a1dba74