Change openstack-dev to openstack-discuss

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

Change-Id: I917d0bd9d0754ee9d05852e5e10bb03504296324
diff --git a/setup.cfg b/setup.cfg
index 3ddc37b..a7094e0 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -4,7 +4,7 @@
 description-file =
     README.rst
 author = OpenStack
-author-email = openstack-dev@lists.openstack.org
+author-email = openstack-discuss@lists.openstack.org
 home-page = https://docs.openstack.org/keystone/latest/
 classifier =
     Environment :: OpenStack