Updated openstack/openstack
Project: openstack/nova  6b579b87d316e6c6317c4752d9922cf156e2ada1

Convert v3 flavor extraspecs plugin to v2.1

This patch changes v3 flavor extraspecs plugin 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: Ibf42ad56ead33846d57904dde2a07f721e6e4af3