sed is your friend.
Also, factorise setUp definition.
Also, use "super" to call methods on superclasses.

Preserve AskPrimary/AnswerPrimary for neoctl/neoadmin exchange only.
Fixes several race conditions during election.

Otherwise, in the case of an unexpected packet, an incorrect message id
would be used.
Also, refuse setting a None peer_id on connection.

This includes an API change of Node.isIdentified, which now tells whether
identification packets have been exchanged or not.
All handlers must be updated to implement '_acceptIdentification' instead of
overriding EventHandler.acceptIdentification: this patch only does it for
StorageOperationHandler

Roughly once every 40 tries on ClusterTests.testElectionWithManyMasters I
get a "port already in use" because runner assigned two master to the same
port.

MasterHandler contains only server-side handlers.

Also, factorise code to be executed when connection is established.

Also, drop captain-obvious comments.

Also, make test_ClientConnection_writable2 test what it says it tests.