interfaces are not configured at all because specific interface files
are created but not sourced. This will result in the VMs running with
the loopback interface only
This is a regression, the problem was already fixed in the past, see commit
b822581d88
Change-Id: I846642772ab582d7567e5182c860cfa0fe882a15
debootstrap is not debian or ubuntu specific. We can make a debootstrap
element that knows how to do all of the things, and then a
debian-minimal and ubuntu-minimal image that use it. Finally, make
the debian element simply be a collection of the extra things we do to
make it look like a cloud-init based cloud image.
Change-Id: Iaf46c8e61bf1cac9a096cbfd75d6d6a9111b701e