Updated openstack/openstack
Project: openstack/requirements  4975fc82cfcb3f119c8a52da56a3cdd1dd8f6831

Update hacking version to align with what projects should use

Now that hacking 0.9.x is in, this is a overlapping change. And since we
leave old versions around in the mirror forever this shouldn't break
existing projects that have yet to migrate to the new hacking.

Change-Id: I679491904f7e8c882db2919351f17a64f3e15378