fix list model ut

Author: harsh97

tests/unitary/with_extras/aqua/test_model.py

@@ -735,7 +735,7 @@ def test_import_model_with_missing_config(
         model_name = "oracle/aqua-1t-mega-model"
         reload(ads.aqua.model.model)
         app = AquaModelApp()
-        app.list_resource = MagicMock(return_value=[])
+        app.list = MagicMock(return_value=[])
         with pytest.raises(AquaRuntimeError):
             model: AquaModel = app.register(
                 model=model_name,