Update test setup code so it correctly inserts all the fixtures we need

Kami · Kami · commit c334a2b858dc · 2019-07-18T14:46:21.000+02:00
for tests.
diff --git a/datastore/tests/system/test_system.py b/datastore/tests/system/test_system.py
@@ -243,6 +243,8 @@ def setUpClass(cls):
         if os.getenv(GCD_DATASET) is not None:
             # Populate the datastore with the cloned client.
             populate_datastore.add_characters(client=cls.CLIENT)
+            populate_datastore.add_uid_keys(client=cls.CLIENT)
+            populate_datastore.add_timestamp_keys(client=cls.CLIENT)
 
         cls.CHARACTERS = populate_datastore.CHARACTERS
         # Use the client for this test instead of the global.
