Comment 1 for bug 1804057

FYI, this is semi-related to lp#1773377 where we're looking to pass dns_frontend IPs to n-ovs and n-gw charms via relation. Instead of this, we can workaround by using/configuring these vips/service_ips and just manually configure the IPs in all three charms plus squash an upstream no-relation-available issu with this feature.