default boolean rePublishIfNoAck() {
        return false;
    }
Used to determine if the queue supports unack/visibility timeout such that the messages will
re-appear on the queue after a specific period and are available to be picked up again and
retried.

@return - false if the queue message need not be re-published to the queue for retriability -
    true if the message must be re-published to the queue for retriability
core/src/main/java/com/netflix/conductor/core/events/queue/ObservableQueue.java