[FIX] point_of_sale: missing tax in accounting entry

The accounting item generated from a PoS order does not contain the
related taxes. Although the accounting entry is globally correct since
the tax line is created manually, the tax should still be written on the
accounting item for reporting purpose.

Note that this is already the behavior when the accounting entry is
generated directly from an invoice.

Fixes #10855

addons/point_of_sale/point_of_sale.py

@@ -1345,6 +1345,7 @@ class pos_order(osv.osv):
                     'analytic_account_id': self._prepare_analytic_account(cr, uid, line, context=context),
                     'credit': ((amount>0) and amount) or 0.0,
                     'debit': ((amount<0) and -amount) or 0.0,
+                    'tax_ids': [(6, 0, line.tax_ids.ids)],
                     'partner_id': order.partner_id and self.pool.get("res.partner")._find_accounting_partner(order.partner_id).id or False
                 })
 
@@ -1383,7 +1384,7 @@ class pos_order(osv.osv):
             for value in group_data:
                 all_lines.append((0, 0, value),)
         if move_id: #In case no order was changed
-            self.pool.get("account.move").write(cr, SUPERUSER_ID, [move_id], {'line_ids':all_lines}, context=context)
+            self.pool.get("account.move").write(cr, SUPERUSER_ID, [move_id], {'line_ids':all_lines}, context=dict(context or {}, dont_create_taxes=True))
             self.pool.get("account.move").post(cr, SUPERUSER_ID, [move_id], context=context)
 
         return True