It has been announced on the list, and it follows the path traced
by other projects (including puppet):
http://lists.openstack.org/pipermail/openstack-discuss/2020-October/017709.html
Also, break down the existing setting of the ocata-em branch
for consistency, and clean up a few comments which were only
needed to retrigger some tags.
Change-Id: I1b9bb9436d1dfe21bca7e2730621248400aec246
d23f551adb