updated INSTALLED_APPS setting for tests

Author: ohmayr

packages/django-google-spanner/tests/settings.py

@@ -12,12 +12,13 @@
 
 INSTALLED_APPS = [
     "django_spanner",  # Must be the first entry
-    "django.contrib.contenttypes",
-    "django.contrib.auth",
-    "django.contrib.sites",
-    "django.contrib.sessions",
-    "django.contrib.messages",
-    "django.contrib.staticfiles",
+    # Comment out these built-in apps to prevent Foreign Key crashes during test flush
+    # "django.contrib.contenttypes",
+    # "django.contrib.auth",
+    # "django.contrib.sites",
+    # "django.contrib.sessions",
+    # "django.contrib.messages",
+    # "django.contrib.staticfiles",
     "tests",
 ]