Code review comment for lp:~nskaggs/juju-ci-tools/add-sane-args-defaults

@mgz, I don't get any errors running this. I think you are pointing out I shouldn't be creating a folder during test runs; absolutely correct, so I've patched that out. I also will add some more tests to ensure __clean_dir() works as it should given I've modified it as well. Is there something else you are referring to?