reset primary master node variable when closing connection to it

git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@231 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/client/handler.py

@@ -106,6 +106,7 @@ class ClientEventHandler(EventHandler):
             # Close connection
             app.master_conn.close()
             app.master_conn = None
+            app.primary_master_node = None
             if self.dispatcher.connecting_to_master_node == 0:
                 logging.critical("trying reconnection to master node...")
                 self.dispatcher.connectToPrimaryMasterNode(app)