Add a fake ZooKeeper driver

This patch add a new driver which mimic a Kazoo client
without the need to use a real zookeeper server.

The dependency Zake (written by Joshua Harlow:harlowja@gmail.com)
has been added which provides the Kazoo API.

Change-Id: I53ca9ac972d6e2dca2f9e04b6187ee0545813e74