analyze_apply_and_background_tests
analyze_apply_and_background_tests

- added a line that tests an image with none of the image below the bound in analyze_bound_horizontal
- added binary image to analyze_color test
- added bad input test for apply_mask function
- force the test to face the situation where bg_img.shape>fg_img.shape to cover an if statement in background_subtraction function

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