Change openstack-dev to openstack-discuss

Mailinglists have been updated.
So, replacing openstack-dev with openstack-discuss.

Change-Id: I33171cb1ee466532823980f31e69393dc6484bd5
diff --git a/setup.cfg b/setup.cfg
index 77a039a..12e2184 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/patrole/latest/
 classifier =
     Environment :: OpenStack