patching PropertiedUser. Register an UserFactoryPlugin to return ERP5Users.

ERP5Type/patches/PropertiedUser.py is now useless and will disapear soon. To
update your ERP5 instance, you will have to add an ERP5 User Factory in your
acl_users (using the ZMI)



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@12286 20353a03-c40f-0410-a6d1-a30d3c3de9de