Make Calendar a subclass of Delivery, because they contain movements

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@20336 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Calendar.py

@@ -28,10 +28,9 @@
 
 from AccessControl import ClassSecurityInfo
 from Products.ERP5Type import Permissions, PropertySheet, Constraint, Interface
-from Products.ERP5Type.XMLObject import XMLObject
-from Products.ERP5.Document.Path import Path
+from Products.ERP5.Document.Delivery import Delivery
 
-class Calendar(Path, XMLObject):
+class Calendar(Delivery):
     """
      Calendar contains Calendar Lines.
     """