Currently we have:
- wmcs.openstack.cloudcontrol.upgrade_openstack_node
- wmcs.openstack.cloudvirt.live_upgrade_openstack
The "cloudcontrol" cookbook is also used for "cloudservices" nodes, which is confusing.
The "cloudvirt" cookbook does not reboot the node, among other differences.
Maybe we can unify it in a generic wmcs.openstack.upgrade_openstack_node that detects the node type and does the right thing?