Revert "Update ovn train candidate to 2.11.0-9"
Revert "Update ovn train candidate to 2.11.0-9"

Rebuild job was broken by cbs client update. We need to re-run.

This reverts commit c00f03cb031d748a81b0777891596806c18672e2.

Change-Id: I4df5870cc45bb48cf7c5d102aec79075414e7042

javierpena/rdoinfo,redhat-openstack/rdoinfo