chore: use fast forwarded Django fork (#782)

Author: IlyaFaer

.kokoro/build.sh

@@ -36,7 +36,7 @@ then
 else
     pip3 install .
     export DJANGO_TESTS_DIR="django_tests_dir"
-    mkdir -p $DJANGO_TESTS_DIR && git clone --depth 1 --single-branch --branch "spanner/stable/2.2.x" https://github.com/c24t/django.git $DJANGO_TESTS_DIR/django
+    mkdir -p $DJANGO_TESTS_DIR && git clone --depth 1 --single-branch --branch "django/stable/2.2.x" https://github.com/googleapis/python-spanner-django.git $DJANGO_TESTS_DIR/django
 
     # Install dependencies for Django tests.
     sudo apt-get update

django_spanner/features.py

@@ -499,6 +499,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
             # Check constraints are not supported by Spanner emulator.
             "constraints.tests.CheckConstraintTests.test_database_constraint",  # noqa
             "constraints.tests.CheckConstraintTests.test_name",  # noqa
+            "admin_docs.test_views.AdminDocViewDefaultEngineOnly.test_template_detail_path_traversal",
             # Untyped parameters are not supported:
             # https://github.com/GoogleCloudPlatform/cloud-spanner-emulator#features-and-limitations
             "auth_tests.test_admin_multidb.MultiDatabaseTests.test_add_view",  # noqa