Updated openstack/openstack
Project: openstack/nova  2a7f3af850c341d016573710300bd30b56d0923c

Replace custom patching in `setUp` on HypervisorsSampleJsonTests

It would be better if we get rid of `setUp` method in 
`HypervisorsSampleJsonTests` in which happens 
patching and replace it on class-mock.

Change-Id: If3758564c4febf2019ecdb4fce972580a562f759