Updated openstack/openstack
Project: openstack/nova  0f7de506b32d26b5cafecd7a09e21ca38aa5cc5f

Change v3 agents API to v2.1

This patch changes v3 agents API to v2.1 and makes v2 unit tests
share between v2 and v2.1.

The differences between v2 and v3 are described on the wiki page
https://wiki.openstack.org/wiki/NovaAPIv2tov3 .

Partially implements blueprint v2-on-v3-api

Change-Id: I96dd9cd3672c6d584bd0019c385544c08f687e7f