Fix r2026: use addresses to tell if we got the answer from the primary.

conn.getUUID() will always return None on a not-identified-yet node, so
the test was always false when a  was given.
Also, test app.primary_master_node for None instead of primary_uuid, as
the case where an unknown primary UUID is received must be handled.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2030 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/master/handlers/election.py

@@ -147,7 +147,9 @@ class ClientElectionHandler(MasterHandler):
                 app.unconnected_master_node_set.clear()
                 app.negotiating_master_node_set.clear()
 
-        if (primary_uuid is None or conn.getUUID() == primary_uuid) and \
+        primary_node = app.primary_master_node
+        if (primary_node is None or \
+            conn.getAddress() == primary_node.getAddress()) and \
                 not conn.isClosed():
             # Request a node identification.
             # There are 3 cases here: