Changes to allow users to skip hadoop service restart coordination
Merge pull request #12 from bijugs/hdfs_dn_rolling_restart

Changes to allow users to skip hadoop service restart coordination
Changes to coordinate the restart of HBase RS services
Merge pull request #13 from bijugs/hbase_rs_rolling_restart

Changes to coordinate the restart of HBase RS services
Changes to coordinate the restart of ZooKeeper services
Changes to coordinate the restart of YARN node manager services
Changes to move non HDFS datanode resources out of datanode recipe
Changes to move Hive related resources required for worker nodes into a new recipe
Changes to allow Kafka set-up to be able to use existing Hadoop ZooKeeper quorum
Changes to remove instance variable from library function znode_exists? and also to handle any ZK connection failure gracefully
Created a Kafka specific attribute file to overwrite the attributes in Kafka community cookbook
Changed Kafka server port to 6667
Changes to upgrade Kafka cookbook to version v0.6.0
Change to pull Kafka community cookbook from its master branch instead of specific version
Changes to move attributes from recipes and new attributes to control Kafka restart
Overwrite the correct Kafka community cookbook attribute for JMX port. This is a bug from PR #27
Changes to enable rolling restart of Kafka service in a cluster