[FIX] website_sale_delivery: use sudo mode for reading carrier info

The "delivery" module restricts the access to delivery.carrier objects.
There is no reason to relax this in website_sale_delivery.

Furthermore, nearly all the code of website_sale_delivery accesses
delivery.carrier in sudo mode already.

Closes odoo/odoo#9812

addons/website_sale_delivery/__openerp__.py

@@ -13,7 +13,6 @@ Delivery Costs
     'data': [
         'views/website_sale_delivery.xml',
         'views/website_sale_delivery_view.xml',
-        'security/ir.model.access.csv',
     ],
     'demo': [
         'data/website_sale_delivery_demo.xml'

addons/website_sale_delivery/models/sale_order.py

@@ -98,7 +98,7 @@ class SaleOrder(orm.Model):
 
     def _get_delivery_methods(self, cr, uid, order, context=None):
         carrier_obj = self.pool.get('delivery.carrier')
-        carrier_ids = carrier_obj.search(cr, uid, [('website_published', '=', True)], context=context)
+        carrier_ids = carrier_obj.search(cr, SUPERUSER_ID, [('website_published', '=', True)], context=context)
         available_carrier_ids = []
         # Following loop is done to avoid displaying delivery methods who are not available for this order
         # This can surely be done in a more efficient way, but at the moment, it mimics the way it's

addons/website_sale_delivery/security/ir.model.access.csv

@@ -1,2 +0,0 @@
-id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
-access_delivery_carrier_public,delivery.carrier.public,delivery.model_delivery_carrier,,1,0,0,0