MAPREDUCE-5270. Migrated MR app from using BuilderUtil factory methods to individual record factory methods. Contributed by Jian He.
svn merge --ignore-ancestry -c 1486271 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1487158 13f79535-47bb-0310-9956-ffa450edef68