HADOOP-10273. Update CHANGES.txt to reflect new target version is 2.3

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1565453 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -322,8 +322,6 @@ Release 2.4.0 - UNRELEASED
     HADOOP-10085. CompositeService should allow adding services while being 
     inited. (Steve Loughran via kasha)
 
-    HADOOP-10273. Fix 'mvn site'. (Arpit Agarwal)
-
     HADOOP-10327. Trunk windows build broken after HDFS-5746.
     (Vinay via cnauroth)
 
@@ -698,6 +696,8 @@ Release 2.3.0 - UNRELEASED
 
     HADOOP-10311. Cleanup vendor names from the code base. (tucu)
 
+    HADOOP-10273. Fix 'mvn site'. (Arpit Agarwal)
+
 Release 2.2.0 - 2013-10-13
 
   INCOMPATIBLE CHANGES