delete hadoop user when reinstalling newest CDH distro
delete hadoop user when reinstalling newest CDH distro

infochimps-labs/ironfan,infochimps-labs/ironfan,infochimps-labs/ironfan,infochimps-away/cluster_chef,infochimps-away/cluster_chef,infochimps-away/cluster_chef,infochimps-away/cluster_chef