message: change tests to make travis happy
diff: @@ -147,7 +147,7 @@ fn test_json() {
  fn test_schema() {
  let mut ds = Dataset::open(fixture!("roads.geojson")).unwrap();
  let layer = ds.layer(0).unwrap();
  - assert_eq!(layer.name(), "roads".to_string());
  + assert_eq!(layer.name(), "OGRGeoJSON".to_string()); // change to "roads" for GDAL >= 2.2
  let name_list: Vec<(String, OGRFieldType)> = layer
  .defn().fields()
  .map(|f| (f.name(), f.field_type()))
  @@ -186,8 +186,8 @@ fn test_geom_fields() {
  #[test]
  fn test_get_layer_by_name() {
  let mut ds = Dataset::open(fixture!("roads.geojson")).unwrap();
  - let layer = ds.layer_by_name("roads").unwrap();
  - assert_eq!(layer.name(), "roads");
  + let layer = ds.layer_by_name("OGRGeoJSON").unwrap(); // change to "roads" for GDAL >= 2.2
  + assert_eq!(layer.name(), "OGRGeoJSON"); // change to "roads" for GDAL >= 2.2
  }
  #[test]
  