On Business Template installation, after migrating a Property Sheet

from filesystem to ZODB, unwrap the created object before adding it to
the PersistentMapping, failing to do so resulted in "Can't Pickle
objects in acquisition wrappers" when serializing the object


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@43155 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BusinessTemplate.py

@@ -3691,7 +3691,7 @@ class PropertySheetTemplateItem(DocumentTemplateItem,
       # Update 'migrate_object_dict' with the new path
       key = 'portal_property_sheets/%s' % class_id
 
-      migrate_object_dict[key] = new_property_sheet
+      migrate_object_dict[key] = new_property_sheet.aq_base
       del migrate_object_dict[class_id]
 
       # Remove old reference in 'object_dict' as it does not make