Fix the broken generator test

Author: bilal-alsharifi

generator/test/test_functions.py

@@ -62,6 +62,7 @@ def test_GetVehicleDataResponse(self):
         expected['function_id'] = 'GET_VEHICLE_DATA'
         expected['class_name'] = 'GetVehicleDataResponse'
         expected['extends_class'] = 'RPCResponse'
+        expected['history'] = None
         expected['imports'] = ['androidx.annotation.NonNull', '',
                                'com.smartdevicelink.protocol.enums.FunctionID',
                                'com.smartdevicelink.proxy.RPCResponse',