[IMP]hr_recruitment:change stages of job positions as per department wis...

...e to job wise.

- Task: https://www.odoo.com/web?&debug=#id=9008&view_type=form&model=project.task&menu_id=3942&action=327
- Pad: https://pad.odoo.com/p/r.Msg2BgZQr8jUoRKF
Rename cases to applicants.