- Use ubuntu:focal as a base image
- Do not build the gate-utils image weekly.
The only place we use this image is in the
kube-node-subnet.sh script where we use the
image published a while ago.
And the only package we install into this image
is ipcalc.
Change-Id: I06dfaef2e429f690b8ca7583933fa85eabcbfea8