Comment 0 for bug 1843104

With:
kolla_base_distro: "ubuntu"
kolla_install_type: "source"
openstack_release: "master"
and images built on 20190820

Trying to:
-> Create a network via Horizon (Create Network dialog

I get:
-> Instant Horizon "Danger" error
-> "KeyError: 'default_dns_nameservers'" in /var/log/kolla/horizon/horizon.log): http://paste.openstack.org/show/772115/

Right now I'm working around this by: https://github.com/igordcard/homedc/blob/master/scripts/kolla/master/bionic/fix-horizon-default_dns_nameservers-after.sh#L20