contains lines.
  getTotalPrice, getTotalQuantity return 0.0 if the current object is not
  considered a movement.

* DeliveryLine.py (manage_afterAdd, manage_beforeDelete): when adding or
  removing a line from a line, reindex the parent, as its "isMovement" value
  might change.

* OrderLine.py: _getTotalPrice, getTotalQuantity support hierarchical orders.

* testOrder: test_19b_getTotalQuantityAndPrice verifies that isMovement,
  getTotalPrice, getTotalQuantity support hierarchical orders.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@19922 20353a03-c40f-0410-a6d1-a30d3c3de9de