Fix missing unit_price currency convertion

issue3036
review697002
(transplanted from 1d1da0ad31d92ddc55db2710ef7ee850caee60b5)

stock.py

@@ -22,6 +22,7 @@ class Move:
         pool = Pool()
         Uom = pool.get('product.uom')
         AccountMoveLine = pool.get('account.move.line')
+        Currency = pool.get('currency.currency')
         assert type_.startswith('in_') or type_.startswith('out_'), \
             'wrong type'
 
@@ -30,7 +31,9 @@ class Move:
         if ((type_.endswith('supplier')
                     or type_ == 'in_production')
                 and self.product.cost_price_method != 'fixed'):
-            unit_price = self.unit_price
+            with Transaction().set_context(date=self.effective_date):
+                unit_price = Currency.compute(self.currency, self.unit_price,
+                    self.company.currency, round=False)
         else:
             unit_price = Uom.compute_price(self.product.default_uom,
                 self.cost_price, self.uom)