TTL Nodes: ZOOKEEPER-2169

[Jordan Zimmerman]

FYI

I’ve posted an implementation for TTL Nodes, 
https://issues.apache.org/jira/browse/ZOOKEEPER-2169 
<https://issues.apache.org/jira/browse/ZOOKEEPER-2169>

https://reviews.apache.org/r/46983/ <https://reviews.apache.org/r/46983/>

-Jordan