Change openstack-dev to openstack-discuss

Mailing lists have been updated. Openstack-discuss replaces
openstack-dev.

Change-Id: I7a9b6b1190e92f142324e0083d39d53c359b0434

setup.cfg

@@ -4,7 +4,7 @@ summary = This repository is for storing documentation and code which relates to
 description-file =
     README.rst
 author = OpenStack
-author-email = openstack-dev@lists.openstack.org
+author-email = openstack-discuss@lists.openstack.org
 home-page = http://www.openstack.org/
 classifier =
     Environment :: OpenStack