[IMP] project : select pricelist on contract based on customer

- Task: https://www.odoo.com/web#id=8147&view_type=form&model=project.task&action=333&active_id=131
- Pad: https://pad.odoo.com/p/r.Wvhtgh6rNS0vLToA
Ooops... I think i missed this one