Add upgrade functions for neutron db and config
Split cirros installation from create_instance
Add ensure_openstack_kernel() helper function

This lets us ensure that we're running on the netns-enabled kernel,
forcing a reboot if not.
Make the basic "pieces" scenario support nova-network and quantum

This adds another scenario file which just ensures that the original
one gets run in such a way that it will do quantum/neutron too.
Merge pull request #2 from cubeek/master

Fix test on existing scenarion
Fix nova-network pieces scenario where demo is not available
Adding usage of floating ip when quantum is used