MAPREDUCE-157. Refactor job history APIs and change the history format to JSON. Contributed by Jothi Padmanabhan.
MAPREDUCE-157. Refactor job history APIs and change the history format to JSON. Contributed by Jothi Padmanabhan.

From: Sharad Agarwal <sharad@apache.org>

git-svn-id: 236921fd9d8b295ce22000433b7f32f512e10ee4@1149827 13f79535-47bb-0310-9956-ffa450edef68

icoding/sqoop,rekhajoshm/sqoopfork,bonnetb/sqoop,baifendian/sqoop,unicredit/sqoop,YaroslavLitvinov/sqoop,pkit/sqoop,apache/sqoop,dlanza1/sqoop,YaroslavLitvinov/sqoop,bonnetb/sqoop,rekhajoshm/sqoopfork,unicredit/sqoop,pkit/sqoop,YaroslavLitvinov/sqoop,bonnetb/sqoop,apache/sqoop,dlanza1/parquet-mr,rekhajoshm/sqoopfork,apache/sqoop,dlanza1/parquet-mr,baifendian/sqoop,pkit/sqoop,baifendian/sqoop,unicredit/sqoop,dlanza1/parquet-mr,dlanza1/sqoop,dlanza1/sqoop,icoding/sqoop,icoding/sqoop