YARN-3222. Added the missing CHANGES.txt entry.

(cherry picked from commit 4620767156ecc43424bc6c7c4d50519e2563cc69)
(cherry picked from commit 015696fb81912d545ce602b245c456c2741a3922)

hadoop-yarn-project/CHANGES.txt

@@ -88,6 +88,9 @@ Release 2.6.1 - UNRELEASED
     YARN-3239. WebAppProxy does not support a final tracking url which has
     query fragments and params (Jian He via jlowe)
 
+    YARN-3222. Fixed RMNode to send scheduler events in sequential order when a
+    node reconnects. (Rohith Sharma K S via jianhe)
+
 Release 2.6.0 - 2014-11-18
 
   INCOMPATIBLE CHANGES