Add some OIDC flow tests.

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

gregsite/settings/testing.py

-from .base import *
+from .dev import *
 
 AUTHENTICATION_BACKENDS = [
     "gregui.authentication.auth_backends.DevBackend",  # Fake dev backend
@@ -10,35 +10,3 @@ AUTHENTICATION_BACKENDS = [
 OIDC_RP_CLIENT_ID = "lalalalala"
 OIDC_RP_CLIENT_SECRET = "lalalalala"
 
-LOGIN_REDIRECT_URL = "http://localhost:3000/"
-LOGOUT_REDIRECT_URL = "http://localhost:3000/"
-
-CSRF_COOKIE_SAMESITE = "Strict"
-SESSION_COOKIE_SAMESITE = "Lax"
-# CSRF_COOKIE_HTTPONLY = True
-# SESSION_COOKIE_HTTPONLY = True
-
-
-ALLOWED_HOSTS += ["localhost", "127.0.0.1"]
-# EMAIL_HOST = "smtp.uio.no"
-# EMAIL_PORT = "468"
-# EMAIL_USE_SSL = True
-# EMAIL_TIMEOUT = 2
-# DEFAULT_FROM_EMAIL = "noreply@uio.no"
-EMAIL_BACKEND = "django.core.mail.backends.console.EmailBackend"
-
-ORGREG_CLIENT = {
-    "endpoints": {"base_url": "https://example.com/fake/"},
-    "headers": {"X-Gravitee-Api-Key": "bar"},
-}
-
-Q_CLUSTER = {
-    "name": "greg",
-    "workers": 4,
-    "timeout": 90,
-    "retry": 120,
-    "queue_limit": 50,
-    "bulk": 10,
-    "orm": "default",
-    "sync": True,
-}