MAPREDUCE-5235. Bring back old fields and exceptions in Counters for binary compatibility with mapred in 1.x. Contributed by Mayank Bansal


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1484992 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-163-trunk-gd