Updated openstack/openstack
Project: openstack/neutron  71820134ea2fa08fd7185cc8b2fa518aaa5f4700

Empty files should not contain copyright or license

Per instruction from
http://docs.openstack.org/developer/hacking/#openstack-licensing

Enable hacking check H104 in this CL.

Change-Id: I435b9d91877499ebe1e33435f06794164a0ecc34
Partial-Bug: #1262424