HADOOP-5144. Move change from 3.0 to 2.3.0 release section

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1518907 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -120,9 +120,6 @@ Trunk (Unreleased)
 
     HDFS-4904. Remove JournalService. (Arpit Agarwal via cnauroth)
 
-    HDFS-5144. Document time unit to NameNodeMetrics. (Akira Ajisaka via
-    suresh)
-
   OPTIMIZATIONS
 
   BUG FIXES
@@ -267,6 +264,9 @@ Release 2.3.0 - UNRELEASED
 
     HDFS-4994. Audit log getContentSummary() calls. (Robert Parker via kihwal)
 
+    HDFS-5144. Document time unit to NameNodeMetrics. (Akira Ajisaka via
+    suresh)
+
   OPTIMIZATIONS
 
   BUG FIXES