Fix outstanding pep8 errors for a clean trunk.
Fix outstanding pep8 errors for a clean trunk.

Also, add an option to run_tests.sh to skip running pep8. We have a separate
job in Jenkins which runs pep8, so there's no need to spin our wheels on it
during the test run.

Change-Id: I552330994e55a36fa96b63658493ed30e2720c85

n0ano/ganttclient