Change openstack-dev to openstack-discuss
Change openstack-dev to openstack-discuss

Mailinglists have been updated. Openstack-discuss replaces openstack-dev.

Change-Id: I9ff02a1120f9a9d300efd3db978b516bc9ba2206

openstack/blazar,stackforge/blazar,ChameleonCloud/blazar,ChameleonCloud/blazar,stackforge/blazar,openstack/blazar