Change Person's password into a PersistentMapping. This allows storing multiple representations of the same password. This is required to interface with foreign applications without storing the password in plaintext.
Update PasswordTool to not encode the password at its level.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@25609 20353a03-c40f-0410-a6d1-a30d3c3de9de