[Accounting] revenue recognition

- Task: https://www.odoo.com/web?#id=6357&view_type=form&model=project.task&action=333&active_id=131
- Pad: https://pad.odoo.com/p/r.n8sCRDTVK3sqmxsV
Well, I don't think reexplaning the purpose of cr, user, ids is necessary. Especially that they do not match the parameter you give for the method. If you have nothing specific to explain, do not add unnecessary comments.