This caps off a bunch of work to get to the new and improved
Resouce2/Proxy2 interfaces. All of the services have been migrated and
the old classes have been removed. Rename openstack.resource2 to
openstack.resource and openstack.proxy2 to openstack.proxy.
Change-Id: I0b7e1c679358e1f60b5316a255aad3a59fbbc8a9