* Fixes the problem related to indendation. Indentation spaces mustn't be kept in cache (Immutable).
* Really remove '_filepath', '_owner', 'uid' and '__ac_local_roles__' attributes instead of setting them to None when they are defined on the object.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@23576 20353a03-c40f-0410-a6d1-a30d3c3de9de