HDFS-8891. HDFS concat should keep srcs order. Contributed by Yong Zhang.

Moved CHANGES.txt entry to 2.7.2

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

@@ -1186,8 +1186,6 @@ Release 2.8.0 - UNRELEASED
 
     HDFS-8565. Typo in dfshealth.html - Decomissioning. (nijel via xyao)
 
-    HDFS-8891. HDFS concat should keep srcs order. (Yong Zhang via jing9)
-
     HDFS-8908. TestAppendSnapshotTruncate may fail with IOException: Failed to
     replace a bad datanode. (Tsz Wo Nicholas Sze via yliu)
 
@@ -1226,6 +1224,8 @@ Release 2.7.2 - UNRELEASED
     HDFS-8863. The remaining space check in BlockPlacementPolicyDefault is
     flawed. (Kihwal Lee via yliu)
 
+    HDFS-8891. HDFS concat should keep srcs order. (Yong Zhang via jing9)
+
 Release 2.7.1 - 2015-07-06
 
   INCOMPATIBLE CHANGES