Code review comment for lp:~mwhudson/ubuntu-cdimage/netboot-tarball

Okay, I think this looks good now. So merging this branch causes some tests to fail, but I can fix those after merging this. They're trivial to fix it seems. So don't worry about those! But a note for the future: even if tests are not 100% green, be sure to check if your branch doesn't cause new test failures ;p (the test case should be much happier now though)