crostestutils: Fix lint errors in files under au_test_harness and ctest

The result is `cros lint au_test_harness/*.py` and `cros lint ctest/*.py` don't
complain. There are over 900 lint errors in files under other directories, but I
don't forsee myself touching any of them in the near future, so I am leaving
them alone...

TEST=`cros lint`, manual ctest run, and trybot

Change-Id: I0ac117a442d652bafe9a11488090181a945e2697
Commit-Ready: Daniel Wang <>
Tested-by: Daniel Wang <>
Reviewed-by: Mike Frysinger <>
10 files changed