Update mailinglist from dev to discuss

openstack-dev was decomissioned this night in https://review.openstack.org/621258
Update openstack-dev to openstack-discuss

Co-authored-by: LeopardMa <mabao@inspur.com>

Change-Id: I06acef3eafe1b9f7842636e9bcb5a637f2d78cc3
Closes-Bug: #1808929

doc/source/user/drivers.rst

@@ -16,11 +16,11 @@ below the table of supported drivers and maintainers:
      - IRC Nick
    * - File System
      - Glance Team
-     - openstack-dev@lists.openstack.org
+     - openstack-discuss@lists.openstack.org
      - openstack-glance
    * - HTTP
      - Glance Team
-     - openstack-dev@lists.openstack.org
+     - openstack-discuss@lists.openstack.org
      - openstack-glance
    * - RBD
      - Fei Long Wang

setup.cfg

@@ -4,7 +4,7 @@ summary = OpenStack Image Service Store Library
 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/glance_store/latest/
 classifier =
     Development Status :: 5 - Production/Stable