Add dependency to curator-test and bump Curator to v2.5.0.

Module curator-test includes the TestingServer class that can be used
to run an embedded ZooKeeper. Useful for tests.
Add a constructor to GlobalConfigurationManager.

The new constructor takes references to GCMPropertyDAO and 
CloudConfig instances instead of the configuration file name. Not used yet.
Add an "ignored" note in the configuration files used in the tests.

The note mentions that property zk.servers is ignored in the tests.
Add tests for the RoQZooKeeperClient class.
Adapt tests to use ZooKeeper through the use of TestingServer instances.
Edit README.md and add an install script for zookeeper.
Cleanup unused code in the MngtController.
Merge pull request #163 from roq-messaging/zookeeper-integration

Zookeeper integration - tests, cleanup and doc