[IMP] account_analytic_analysis : Add recurring field to product and add...

... product to contract if it is recurring product on creation of sale order

- Task: https://www.odoo.com/web#id=9315&view_type=form&model=project.task&menu_id=3942&action=327
- Pad: https://pad.odoo.com/p/r.mDSbrxm5I4kNe8W7
Remove @api.model.