Solvers: expand the simulation movement we're modifying in CopyAndPropagate

Instead of expanding one below it that might not have been modified at all.

product/ERP5/TargetSolver/CopyAndPropagate.py

@@ -73,8 +73,6 @@ class CopyAndPropagate(TargetSolver):
                            quantity_ratio=quantity_ratio,
                            value_dict=value_dict,
                            property_id=property_id)
-    # XXX: would it be safe to expand by activity ?
-    simulation_movement.expand('immediate')
 
   def _solveRecursively(self, simulation_movement, is_last_movement=1,
                         quantity_ratio=None, value_dict=None,
@@ -106,3 +104,5 @@ class CopyAndPropagate(TargetSolver):
       if not simulation_movement.isPropertyRecorded(property_id):
         simulation_movement.recordProperty(property_id)
     simulation_movement.edit(**value_dict)
+    # XXX would it be safe to expand by activity ?
+    simulation_movement.expand('immediate')