Initial import of ClientHandler class unit test.

Note: there are 3 unimplemented tests (raising NotImplementedError).
 test_StopOperation: looks unimplemented in current code (no action besides logging).
 test_knownMasterNotifyNodeInformation & test_unknownMasterNotifyNodeInformation: it is yet unsure on how to test those cases.


git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@309 71dcc9de-d417-0410-9af5-da40c76e7ee4