Issue: Discounts are not displayed in DDT Steps to reproduce: - create a quotation with a sale line having a discount - smart button delivery > set qty > validate - Print opw-3745866 closes odoo/odoo#162287 X-original-commit: 957443d8a0f416997de9c99354c9d3ae2fb3dfbf Signed-off-by: Josse Colpaert <jco@odoo.com> Signed-off-by: Yolann Sabaux (yosa) <yosa@odoo.com>