Make test_oauth2client not executable so it runs with nose. Also corrects a change which failed on py26.
Make test_oauth2client not executable so it runs with nose. Also corrects a change which failed on py26.

jonparrott/oauth2client,google/oauth2client,clancychilds/oauth2client,jonparrott/oauth2client,googleapis/oauth2client,clancychilds/oauth2client,googleapis/oauth2client,google/oauth2client