Adding this line to codereview.settings should do the trick:
  GERRIT_SKIP_ENSURE_AUTHENTICATED: true

And I also cleaned up tests so they don't spill too much to stdout.

BUG=603378
R=machenbach@chromium.org,andybons@chromium.org
CC=shinyak@chromium.org

Review URL: https://codereview.chromium.org/1884173003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@299926 0039d316-1c4b-4281-b951-d872f2087c98