Fix postgres job and make it non-voting for now
Fix postgres job and make it non-voting for now

The job has been running with mysql instead of postgres for some time
and we need to iteratively fix the issues that have accumulated in the
meantime.

Change-Id: I312c1e364643daad6754c743678a9d5b4a6f9984
Signed-off-by: Graham Hayes <de06109890d26a134f724246c64e1c553881974a@ham.ie>

openstack/designate,openstack/designate,openstack/designate