erp5_base&simulation: be able to set related order in order to group movement into one delivery

bt5/erp5_base/DocumentTemplateItem/portal_components/document.erp5.OrderMovementGroup.py

@@ -46,6 +46,10 @@ class OrderMovementGroup(MovementGroup):
                ).issubset(movement.getCausalityList()), {}
 
   def _getOrderRelativeUrl(self, movement):
+    order_relative_url = getattr(movement, 'order_relative_url', None)
+    if order_relative_url:
+      return order_relative_url
+
     try:
       getRootAppliedRule = movement.getRootAppliedRule
     except AttributeError:

bt5/erp5_simulation/DocumentTemplateItem/portal_components/document.erp5.QuantitySplitSolver.py

@@ -137,6 +137,9 @@ class QuantitySplitSolver(SolverMixin, ConfigurableMixin, XMLObject):
         destination = configuration_dict.get('destination', None)
         if destination:
           new_movement.setDestination(destination)
+        order_relative_url = configuration_dict.get('order_relative_url', None)
+        if order_relative_url:
+          new_movement.edit(order_relative_url = order_relative_url)
         if activate_kw:
           new_movement.setDefaultActivateParameterDict({})
         simulation_movement.expand(activate_kw=activate_kw)