This uncomments the list additions for the lists.openstack.org site
on the new mailman server, and should be merged the day of the
maintenance prior to the start of the scheduled outage window.
Separately removing configuration from the old server is
unnecessary, as there will be a cleanup change merged after the
maintenance window to remove all files associated with it and clear
it out of our inventory in preparation for archival imaging and
deletion (the old server will have its services disabled and be kept
in our emergency skip list for Ansible until that happens).
Change-Id: I1f6d3c8dfcb2bb98fa5b93bcc2f4a13927c55047
f4902e98fd