Implement nova network API for quantum API 2.0
Implement nova network API for quantum API 2.0

blueprint improved-nova-quantum-integration

This new network API depends on quantum v2.0 client to connect quantum server
via Quantum server API V2.0. This change implements the minimum set of methods
so that we can boot an instance with ip allocated by quantum server.

Change-Id: I34acbbf84dd8601db8143267c8cc41255a0c6d3f

hyakuhei/cleantox,openstack-dev/hacking,hyakuhei/cleantox,openstack-dev/hacking,emonty/oslo-hacking,zancas/hacking,zancas/hacking,emonty/oslo-hacking