Updated CHANGES.txt for YARN-1311.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1550615 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/CHANGES.txt

@@ -165,6 +165,9 @@ Release 2.4.0 - UNRELEASED
     YARN-1325. Modified RM HA configuration validation to also ensure that
     multiple RMs are configured. (Xuan Gong via vinodkv)
 
+    YARN-1311. Fixed app specific scheduler-events' names to be app-attempt
+    based. (vinodkv via jianhe)
+
   OPTIMIZATIONS
 
   BUG FIXES