Update tests for correct band default

Author: drewbo

tests/test_landsat.py

@@ -109,7 +109,7 @@ def test_download_correct_zip(self, mock_downloader):
         args = ['download', 'LC80010092015051LGN00', '-d', self.mock_path]
         output = landsat.main(self.parser.parse_args(args))
         mock_downloader.assert_called_with(download_dir=self.mock_path, usgs_pass=None, usgs_user=None)
-        mock_downloader.return_value.download.assert_called_with(['LC80010092015051LGN00'], [])
+        mock_downloader.return_value.download.assert_called_with(['LC80010092015051LGN00'], None)
         self.assertEquals(output, ['Download Completed', 0])
 
     @mock.patch('landsat.landsat.process_image')