Comment 7 for bug 1290890

Just to be clear, not all the packages are in cloud-tools today, but the goal was that if we ever did add one, it means we want to install that specific version, without having to recompile jujud to notice the new tool. (because we add the cloud tools archive at lower priority so it doesn't affect workloads, but anything *juju* installs should prefer the cloud tools archive.)