configurator_standar: enable CurrencyConstraint on Currencies

So that we keep the same behavior of having required and non-duplicate
references on currencies

bt5/erp5_configurator_standard/SkinTemplateItem/portal_skins/erp5_configurator_standard/BusinessConfiguration_displayDownload.py

@@ -25,3 +25,7 @@ for portal_type in ['Purchase Order Line', 'Sale Order Line','Sale Packing List
 configuration_save.addConfigurationItem("Portal Type Configurator Item",
                                         target_portal_type='Inventory',
                                         add_propertysheet_list=('InventoryConstraint',))
+
+configuration_save.addConfigurationItem("Portal Type Configurator Item",
+                                        target_portal_type='Currency',
+                                        add_propertysheet_list=('CurrencyConstraint',))

bt5/erp5_configurator_standard/TestTemplateItem/portal_components/test.erp5.testStandardConfigurationWorkflow.py

@@ -919,6 +919,7 @@ class StandardConfigurationMixin(TestLiveConfiguratorWorkflowMixin):
     self.assertIn('TradeOrder', portal_types['Sale Order'].getTypePropertySheetList())
     self.assertIn('TradeOrderLine', portal_types['Sale Order Line'].getTypePropertySheetList())
     self.assertIn('InventoryConstraint', portal_types['Inventory'].getTypePropertySheetList())
+    self.assertIn('CurrencyConstraint', portal_types['Currency'].getTypePropertySheetList())
 
   def stepCheckSaleOrderSimulation(self, sequence=None, sequence_list=None, **kw):
     """