Fixed incorrect jira in CHANGES.txt (YARN-716 to YARN-715)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1485582 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/CHANGES.txt

@@ -404,7 +404,7 @@ Release 2.0.5-beta - UNRELEASED
 
     YARN-706. Fixed race conditions in TestFSDownload. (Zhijie Shen via vinodkv).
 
-    YARN-716. Fixed unit test failures - TestDistributedShell and
+    YARN-715. Fixed unit test failures - TestDistributedShell and
     TestUnmanagedAMLauncher. (Vinod Kumar Vavilapalli via sseth)
 
 Release 2.0.4-alpha - 2013-04-25