Move the change log of HADOOP-3159 to be in release 0.16.3 section

git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/trunk@644951 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -512,6 +512,9 @@ Release 0.16.3 - Unreleased
     HADOOP-3010. Fix ConcurrentModificationException in ipc.Server.Responder.
     (rangadi)
 
+    HADOOP-3159. Avoid file system cache being overwritten whenever
+    configuration is modified. (Tsz Wo (Nicholas), SZE via hairong)
+
 Release 0.16.2 - 2008-04-02
 
   BUG FIXES
@@ -717,9 +720,6 @@ Release 0.16.1 - 2008-03-13
     HADOOP-2813. TestDU unit test uses its own directory to run its 
     sequence of tests.  (Mahadev Konar via dhruba)
 
-    HADOOP-3159. Avoid file system cache being overwritten whenever
-    configuration is modified. (Tsz Wo (Nicholas), SZE via hairong)
-
 Release 0.16.0 - 2008-02-07
 
   INCOMPATIBLE CHANGES