since the closure will stay the same among all business paths,
transform
 for path in previous_path_list:
   for movement in path.getRelatedMovementValueList():
into:
 closure = current_path.getBusinessPathClosure()
 for movement in closure:

This means that number of simulation tree walks is reduced by a factor of
 len(previous_path_list)


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@36585 20353a03-c40f-0410-a6d1-a30d3c3de9de