YARN-3248. Correct fix version from branch-2.7 to branch-2.8 in the change log.

hadoop-yarn-project/CHANGES.txt

@@ -94,6 +94,9 @@ Release 2.8.0 - UNRELEASED
     YARN-3424. Change logs for ContainerMonitorImpl's resourse monitoring
     from info to debug. (Anubhav Dhoot via ozawa)
 
+    YARN-3248. Display count of nodes blacklisted by apps in the web UI.
+    (Varun Vasudev via xgong)
+
   OPTIMIZATIONS
 
     YARN-3339. TestDockerContainerExecutor should pull a single image and not
@@ -864,9 +867,6 @@ Release 2.7.0 - UNRELEASED
     removing inconsistencies in the default values. (Junping Du and Karthik
     Kambatla via vinodkv)
 
-    YARN-3248. Display count of nodes blacklisted by apps in the web UI.
-    (Varun Vasudev via xgong)
-
 Release 2.6.0 - 2014-11-18
 
   INCOMPATIBLE CHANGES