Move YARN-3580 in CHANGES.txt from 2.8 to 2.7.2.

(cherry picked from commit d2e01f4ed87c3c41156ec9a68855f923f8c0adf9)

hadoop-yarn-project/CHANGES.txt

@@ -637,9 +637,6 @@ Release 2.8.0 - UNRELEASED
 
     YARN-3582. NPE in WebAppProxyServlet. (jian he via xgong)
     
-    YARN-3580. [JDK8] TestClientRMService.testGetLabelsToNodes fails. (Robert Kanter
-    via junping_du)
-
     YARN-3577. Misspelling of threshold in log4j.properties for tests.
     (Brahma Reddy Battula via aajisaka)
 
@@ -1095,6 +1092,9 @@ Release 2.7.2 - UNRELEASED
     YARN-4313. Race condition in MiniMRYarnCluster when getting history server
     address. (Jian He via xgong)
 
+    YARN-3580. [JDK8] TestClientRMService.testGetLabelsToNodes fails. (Robert Kanter
+    via junping_du)
+
 Release 2.7.1 - 2015-07-06
 
   INCOMPATIBLE CHANGES