Move the CHANGES.txt entry for HDFS-4804 from BUG to IMPROVEMENT.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1480101 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -496,6 +496,9 @@ Release 2.0.5-beta - UNRELEASED
     the datanode with the most recent heartbeat as the primary.  (Varun Sharma
     via szetszwo)
 
+    HDFS-4804. WARN when users set the block balanced preference percent below
+    0.5 or above 1.0. (Stephen Chu via atm)
+
   OPTIMIZATIONS
 
   BUG FIXES
@@ -627,9 +630,6 @@ Release 2.0.5-beta - UNRELEASED
 
     HDFS-4784. NPE in FSDirectory.resolvePath(). (Brandon Li via suresh)
 
-    HDFS-4804. WARN when users set the block balanced preference percent below
-    0.5 or above 1.0. (Stephen Chu via atm)
-
 Release 2.0.4-alpha - UNRELEASED
 
   INCOMPATIBLE CHANGES