[Checkins] [zopefoundation/zope.testrunner] 4345fd: Fix nondeterministic test failures on Python 3.3

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/zope.testrunner
  Commit: 4345fdc11e00c8db9beb2e80c0cdd55a5634fe56
      https://github.com/zopefoundation/zope.testrunner/commit/4345fdc11e00c8db9beb2e80c0cdd55a5634fe56
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2013-06-06 (Thu, 06 Jun 2013)

  Changed paths:
    M src/zope/testrunner/tests/testrunner-debugging-import-failure.test
    M src/zope/testrunner/tests/testrunner-debugging-layer-setup.test

  Log Message:
  -----------
  Fix nondeterministic test failures on Python 3.3

See http://docs.python.org/3/library/importlib#importlib.invalidate_caches:

  "This function should be called if any modules are created/installed
  while your program is running to guarantee all finders will notice the
  new module’s existence."