Added a few more tests and negative tests
Added a few more tests and negative tests

stiphyMT/plantcv,stiphyMT/plantcv,jshoyer/plantcv,jshoyer/plantcv,stiphyMT/plantcv,AntonSax/plantcv,danforthcenter/plantcv,danforthcenter/plantcv,AntonSax/plantcv,danforthcenter/plantcv