Remove false positives in tests due to Django bug

By reordering INSTALLED_APPS, a large amount of false positives that
were generated during automated tests are avoided. This is the stated
(and otherwise harmless) work-around as per the Django bug:
https://code.djangoproject.com/ticket/10827

settings.py

@@ -85,8 +85,8 @@
 TEST_RUNNER = 'django.test.runner.DiscoverRunner'
 
 INSTALLED_APPS = (
-    'django.contrib.auth',
     'django.contrib.contenttypes',
+    'django.contrib.auth',
     'django.contrib.messages',
     'django.contrib.sessions',
     'django.contrib.sites',