Port hr_holidays_lunch_voucher and hr_holidays_lunch_voucher_natixis to v10

hr_holidays_lunch_voucher_natixis/wizard/lunch_voucher_purchase.py

@@ -3,15 +3,14 @@
 # @author Alexis de Lattre <alexis.delattre@akretion.com>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
-from openerp import models, fields, api, _
-from openerp.exceptions import Warning as UserError
-from openerp.tools import float_is_zero
+from odoo import models, fields, _
+from odoo.exceptions import UserError
+from odoo.tools import float_is_zero
 
 
 class LunchVoucherPurchase(models.TransientModel):
     _inherit = 'lunch.voucher.purchase'
 
-    @api.multi
     def run(self):
         self.ensure_one()
         action = super(LunchVoucherPurchase, self).run()