Fix exception in tearDown on ppc buildbot.  If there's no directory, that shouldn't cause the test to fail.  Just like it setUp.
Fix exception in tearDown on ppc buildbot.  If there's no directory,
that shouldn't cause the test to fail.  Just like it setUp.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator