update opening input_roi_hierarchy.npz in test_plantcv_roi_objects
update opening input_roi_hierarchy.npz in test_plantcv_roi_objects

danforthcenter/plantcv,stiphyMT/plantcv,danforthcenter/plantcv,stiphyMT/plantcv,danforthcenter/plantcv,stiphyMT/plantcv