Comment 4 for bug 1933966

I'm wondering if this is because the following does not have md5s published:
http://cloud-images.ubuntu.com/minimal/daily/streams/v1/com.ubuntu.cloud:daily:download.sjson

as compared to the following which does have md5s published:
http://cloud-images.ubuntu.com/daily/streams/v1/com.ubuntu.cloud:daily:download.sjson

If I understand correctly, charm-octavia-diskimage-retrofit test bundles configure both of these. For example:
https://opendev.org/openstack/charm-octavia-diskimage-retrofit/src/branch/master/src/tests/bundles/bionic-ussuri.yaml#L38

Testing that theory here: https://review.opendev.org/c/openstack/charm-octavia-diskimage-retrofit/+/812400