Updated openstack/openstack
Project: openstack/nova  e6aa3c8f484ac7ad40adcb1dee1f9454f4bd363f

Cleanup in test_availability_zone not to use wsgi_app

In API unit testing, making call through WSGI is little bit overhead,
wherever applicable, unit tests can make direct call to controller
methods.
Some unit tests need WSGI call to tests more than one plugin together.

This patch makes above cleanup in test_availability_zone.

Partially implements blueprint v2-on-v3-api

Change-Id: I4e5651631f5c9a3c6015ab603789fb155848448c