Fix up unit test env issues. Review thread: http://codereview.appspot.com/5087047/
Fix up unit test env issues. Review thread: http://codereview.appspot.com/5087047/

googleapis/google-api-python-client,google/oauth2client,google/oauth2client,clancychilds/oauth2client,jonparrott/oauth2client,jonparrott/oauth2client,googleapis/google-api-python-client,clancychilds/oauth2client,googleapis/oauth2client,googleapis/oauth2client