Fix defaults for cofig generation

app/drb_cdb_types.py

@@ -38,7 +38,7 @@ class ConfigGenerator:
             "type": self.type,
             "systemName": self.systemName,
             "channels": self.channels,
-            "tags": [tag.to_dict() for tag in self.tags] if self.tags else None,
+            "tags": [tag.to_dict() for tag in self.tags] if self.tags else [],
-            "whitelist": self.whitelist if self.whitelist else None
+            "whitelist": self.whitelist if self.whitelist else []
         }
         return data