HDFS-4053. Move the jira description to release 2.1.0 section

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1490085 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -4,8 +4,6 @@ Trunk (Unreleased)
 
   INCOMPATIBLE CHANGES
 
-    HDFS-4053. Increase the default block size. (eli)
-
     HDFS-3034. Remove the deprecated DFSOutputStream.sync() method.  (szetszwo)
 
   NEW FEATURES
@@ -245,6 +243,8 @@ Release 2.1.0-beta - UNRELEASED
 
   INCOMPATIBLE CHANGES
 
+    HDFS-4053. Increase the default block size. (eli)
+
     HDFS-4305. Add a configurable limit on number of blocks per file, and min
     block size. (Andrew Wang via atm)