revert r.27370 because SortIndex is not in ERP5Type.PropertySheet but in ERP5.PropertySheet.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27380 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Core/DistributedRamCache.py

@@ -31,6 +31,7 @@ from AccessControl import ClassSecurityInfo
 from Products.ERP5Type.XMLObject import XMLObject
 from Products.ERP5Type import PropertySheet
 from Products.ERP5Type import Permissions
+from Products.ERP5.PropertySheet.SortIndex import SortIndex
 from Products.ERP5Type.PropertySheet.BaseCache import BaseCache
 from Products.ERP5Type.PropertySheet.DistributedRamCache import DistributedRamCache
 
@@ -57,7 +58,7 @@ class DistributedRamCache(XMLObject):
   property_sheets = ( PropertySheet.Base
                     , PropertySheet.SimpleItem
                     , PropertySheet.Folder
-                    , PropertySheet.SortIndex
+                    , SortIndex
                     , BaseCache
                     , DistributedRamCache
                     )