Update target version to 2.4.0 for HADOOP-10278 and HADOOP-10285 in CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1573072 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -8,12 +8,6 @@ Release 2.5.0 - UNRELEASED
 
   IMPROVEMENTS
 
-    HADOOP-10278. Refactor to make CallQueue pluggable. (Chris Li via
-    Arpit Agarwal)
-
-    HADOOP-10285. Admin interface to swap callqueue at runtime. (Chris Li via
-    Arpit Agarwal)
-
   OPTIMIZATIONS
 
   BUG FIXES 
@@ -49,6 +43,12 @@ Release 2.4.0 - UNRELEASED
     HADOOP-10374. InterfaceAudience annotations should have
     RetentionPolicy.RUNTIME (Enis Soztutar via Arpit Agarwal)
 
+    HADOOP-10278. Refactor to make CallQueue pluggable. (Chris Li via
+    Arpit Agarwal)
+
+    HADOOP-10285. Admin interface to swap callqueue at runtime. (Chris Li via
+    Arpit Agarwal)
+
   OPTIMIZATIONS
 
   BUG FIXES