Move YARN-4092 to 2.7.2

(cherry picked from commit 4eaa7fd3eae4412ac0b964c617b1bbb17a39d8be)

hadoop-yarn-project/CHANGES.txt

@@ -370,9 +370,6 @@ Release 2.8.0 - UNRELEASED
     YARN-1556. NPE getting application report with a null appId. (Weiwei Yang via 
     junping_du)
 
-    YARN-4092. Fixed UI redirection to print useful messages when both RMs are
-    in standby mode. (Xuan Gong via jianhe)
-
   OPTIMIZATIONS
 
     YARN-3339. TestDockerContainerExecutor should pull a single image and not
@@ -772,6 +769,8 @@ Release 2.7.2 - UNRELEASED
     YARN-3978. Configurably turn off the saving of container info in Generic AHS
     (Eric Payne via jeagles)
 
+    YARN-4092. Fixed UI redirection to print useful messages when both RMs are
+    in standby mode. (Xuan Gong via jianhe)
 
   OPTIMIZATIONS