Prefer replacing dead nodes with the same IP.

[mattl-netflix]

No description provided.

[clohfink]

NP: Can ignore this but could do the isNew and same ip in same stream with a reduce like

    .reduce((current, next) -> {
        if (myInstanceInfo.getPrivateIP().equals(next.getHostIP())) {
            return next;
        } else if (!isNew(next) && !current.isPresent()) {
            return next;
        }
        return current;
    });```

[mattl-netflix]

Ahh the oft-neglected reduce! Though recall we are dealing with PriamInstances not Optionals so the !current.isPresent() check doesn't work as expected. Instead the logic should be:

filter(i -> !isNew(i))
.reduce(
    (current, next) ->
        myInstanceInfo.getPrivateIP().equals(next.getHostIP()) 
            ? next
            : current);