Update changelog to include HADOOP-4788
Update changelog to include HADOOP-4788


git-svn-id: 5be3658b1da2303116c04834c161daea58df9cc4@757667 13f79535-47bb-0310-9956-ffa450edef68

toddlipcon/hadoop,toddlipcon/hadoop,toddlipcon/hadoop,toddlipcon/hadoop,toddlipcon/hadoop,toddlipcon/hadoop,toddlipcon/hadoop,toddlipcon/hadoop,toddlipcon/hadoop