Add some OIDC flow tests.

Enable testing for gregui, add a django config for testing.

gregui/tests/conftest.py

@@ -4,7 +4,6 @@ import time
 import logging
 import pytest
 
-
 from django.contrib.auth import get_user_model
 from django.utils.timezone import make_aware
 from rest_framework.authtoken.admin import User