Implemented a candidate node REST client.
Added zookeeper-leader lifecycle scripts.
Lifecycle scripts improvements.

Removed verbose from tar command.
Verify zookeeper zip file was downloaded before extraction.
Changed jersey-json position in dependencies to first among jersey dependencies.
On package phase also create a jar with dependencies included.
Added start/stop prints to zk-leader main runner and removed input stream.
Continued zookeeper-leader single machine test.
use wget quiet mode and verify downloaded file exists.
Organized zk leader single node test and added test to vm group (excluded in maven).