Remove old ovndbs update workaround
Remove old ovndbs update workaround

This is basically a revert ot I8f71bf83ddafca167deae1a38ca819f7d930fb80
https://bugzilla.redhat.com/show_bug.cgi?id=1759974 has now been fixed
via https://bugzilla.redhat.com/show_bug.cgi?id=1760763:
"[ovsdb-server] Allow replicating from older schema servers"
which has been fixed in openvswitch2.11-2.11.0-35.el8fdp.x86_64
which was released on 2020-01-22.

I think in master (and potentially wallaby) we can just remove this
workaround now.

Change-Id: I428a30d2ad7be295f8b3dbeaddd76eb88432a532

openstack/tripleo-heat-templates,openstack/tripleo-heat-templates