Updated openstack/openstack
Project: openstack/python-openstackclient  3c28436268cf362d4cc4f65317d619760b21b701

Rename `os project usage list` to `os usage list`

There really isn't anything project specific about the command,
it should really just be `os usage list`. For at least one
development cycle we should keep the old command.

Change-Id: I4d1df801576c259b527e87369f3121b94393cfa8