Add support for deploying CDH4 hdfs HA and federation
Hbase cookbooks implement for supporting yum server.
Fix zookeeper install from tarball bug
Change cluster_id in format primary namenode recipe
fix zookeeper home dir bug
mv recipe add_distro and lib hadoop_distro from hadoop_cluster to hadoop_common
support deploy hbase on cdh4 hdfs with HA and Federation enabled
bug fix for SERENGETI-887
Fix CDH4 namenode can not recognize datanodes correctly
Disable hortonworks's hmonitor if distro is CDH4
Hmonitor service should not start at system boot time
Move some common functions into hadoop_common
Default MapR cluster works