[CDH4] Bump version to 2.0.0-cdh4-INTERNAL

Change-Id: I8302324d9e3ed467cc3a58057de6b40fab6cade9
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/4083
Reviewed-by: Henry Robinson <henry@cloudera.com>
Tested-by: Lenni Kuff <lskuff@cloudera.com>