[CDH5] Bump version to v2.1.0

Change-Id: Id89a1d71f2a8ef9ad79c6366dfa90e86cc88b885
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/4570
Reviewed-by: Lenni Kuff <lskuff@cloudera.com>
Tested-by: Lenni Kuff <lskuff@cloudera.com>