This ticket adds a test that verifies the behavior of the 'killSessions' command on a session that has a prepared transaction. If there is a prepared transaction on a session, running 'killSessions' on that session will not abort the prepared transaction, and the command will not return an error. Similarly for a 'killAllSessions' command that targets a prepared transaction session. If this is not already clear in our documentation we may want to consider making this behavior clear.