Add device_list to fixtures

Author: bouwew

tests/test_smile.py

@@ -396,6 +396,7 @@ async def device_test(
             self.cooling_present = data.gateway["cooling_present"]
         self.notifications = data.gateway["notifications"]
         self._write_json("all_data", {"gateway": data.gateway, "devices": data.devices})
+        self._write_json("device_list", smile.device_list)
         self._write_json("notifications", data.gateway["notifications"])
 
         location_list = smile._thermo_locs