conflict of django.contrib.auth with project's middleware

[andrey@…]

If I add django-debug-toolbar middleware, which uses session access, test "Session not accessed will" fail:

Traceback (most recent call last):
  File "/Users/gugu/w/virtualenv/eksmo/src/django/django/contrib/auth/tests/context_processors.py", line 31, in test_session_not_accessed
    self.assertContains(response, "Session not accessed")
  File "/Users/gugu/w/virtualenv/eksmo/src/django/django/test/testcases.py", line 538, in assertContains
    msg_prefix + "Couldn't find '%s' in response" % text)
AssertionError: Couldn't find 'Session not accessed' in response

You need to override middleware list to make this test working in all configurations

[Claude Paroz]

Duplicate of #16366