Base.manage_afterAdd must be called only one time,this solve the duplicate uid bug on images

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@2660 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Image.py

@@ -199,7 +199,6 @@ or 'HTML'. Text can be automatically translated through the use of\
       CMFPhoto.manage_afterClone(self, item)
 
     def manage_afterAdd(self, item, container):
-      Base.manage_afterAdd(self, item, container)
       CMFPhoto.manage_afterAdd(self, item, container)
 
     def manage_beforeDelete(self, item, container):