- Some private methods of Connection prefixed with '_'
- Thus those methods are no more overriden in MT* classes 
- Add description of notify/ask/answer methods and lockCheckWrapper
- Remove a forgotten addPacket from storage handler and another from master
service handler that requires to add an optional msg_id parameter to notify
- Update tests


git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@509 71dcc9de-d417-0410-9af5-da40c76e7ee4