YARN-2859 addendum: move the entry from 2.6.2 to 2.6.3 in hadoop-yarn/CHANGES.txt.

(cherry picked from commit 866dce4e8e105d0e2c7e041b5d30213536a61702)

hadoop-yarn-project/CHANGES.txt

@@ -1880,6 +1880,9 @@ Release 2.6.3 - UNRELEASED
     YARN-4241. Fix typo of property name in yarn-default.xml.
     (Anthony Rojas via aajisaka)
 
+    YARN-2859. ApplicationHistoryServer binds to default port 8188 in MiniYARNCluster.
+    (Vinod Kumar Vavilapalli via xgong)
+
 Release 2.6.2 - 2015-10-28
 
   INCOMPATIBLE CHANGES
@@ -1928,9 +1931,6 @@ Release 2.6.2 - 2015-10-28
     YARN-3798. ZKRMStateStore shouldn't create new session without occurrance of 
     SESSIONEXPIED. (ozawa and Varun Saxena)
 
-    YARN-2859. ApplicationHistoryServer binds to default port 8188 in MiniYARNCluster.
-    (Vinod Kumar Vavilapalli via xgong)
-
 Release 2.6.1 - 2015-09-23
 
   INCOMPATIBLE CHANGES