Update bulkresize.py file
Update bulkresize.py file

- Add rename_img and output_path_concat functions

- This additions will seperate the login of renaming or the path concatination of the resized images from the resizing logic

- Now bulk_resizer function has only one functionality which is the resizing of the images

sukeesh/Jarvis,sukeesh/Jarvis,sukeesh/Jarvis,sukeesh/Jarvis