tests: prevent loading of a2 settings by rbac tests (#42694)

src/django_rbac/test_settings.py

@@ -3,8 +3,8 @@ import os
 from django.conf import global_settings
 
 MIDDLEWA_CLASSES = global_settings.MIDDLEWARE
-
 SECRET_KEY = 'whatever'
+
 DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.sqlite3',
@@ -17,12 +17,3 @@ INSTALLED_APPS = (
     'django.contrib.contenttypes',
     'django_rbac',
 )
-
-
-ALLOWED_HOSTS = []
-
-TEMPLATES = [{'DIRS': []}]
-
-if 'AUTHENTIC2_SETTINGS_FILE' in os.environ:
-    with open(os.environ['AUTHENTIC2_SETTINGS_FILE']) as fd:
-        exec(fd.read())

tox.ini

@@ -29,8 +29,7 @@ whitelist_externals =
   /bin/mv
 setenv =
 
-  AUTHENTIC2_SETTINGS_FILE=tests/settings.py
-
+  authentic: AUTHENTIC2_SETTINGS_FILE=tests/settings.py
   authentic: DJANGO_SETTINGS_MODULE=authentic2.settings
   rbac: DJANGO_SETTINGS_MODULE=django_rbac.test_settings