fix model_tracks_url_list in integration test
fix model_tracks_url_list in integration test

Duke-GCB/iMADS,Duke-GCB/TF-DNA-PredictionsDB,Duke-GCB/TF-DNA-PredictionsDB,Duke-GCB/iMADS,Duke-GCB/iMADS,Duke-GCB/TF-DNA-PredictionsDB,Duke-GCB/TF-DNA-PredictionsDB,Duke-GCB/iMADS