This state was only internal to master node, and was not even
consistently handled in master (only the first election was done in that
state).
changeClusterState was never called with that state as parameter.
Finally, remove this state from protocol as it's not used any longer.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@1550 71dcc9de-d417-0410-9af5-da40c76e7ee4