Updated openstack/openstack
Project: openstack/nova  5c8bbaafef590e4d346a03051a0ba55c8be26c5c

Add tox -e functional

Provide a tox -e functional stub, as a place for functional tests to
migrate to. This will allow us to write a zuul test configuration for this
environment.

Part of bp:functional-tests-for-nova

Change-Id: I8a1107beab151f9bf574cfbae1d4dc18400fd74e