Open Stack

Hi, I'd like you to take a look at this patch for potential
DocImpact.
https://review.openstack.org/19008

Log:
commit 8880aadb976db6ec79a1eed61feb1bc82af0f8e4
Author: Yun Mao <yunmao at gmail.com>
Date:   Thu Feb 7 16:46:35 2013 -0500

    Implement ZooKeeper driver for ServiceGroup API.
    
    The ZooKeeper driver uses ephemeral nodes in ZooKeeper to keep
    track of node liveness in a service group. The Implementation is
    based on the evzookeeper library to combine zookeeper
    and eventlet.
    
    Part of blueprint zk-service-heartbeat
    
    DocImpact: new driver
    
    Change-Id: Ia20519de2b4964007f8b91ea5d56d1875510d40f