Move HADOOP-9121 from 3.0.0 to 2.7.3 in CHANGES.txt.

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -387,9 +387,6 @@ Trunk (Unreleased)
     HADOOP-9037. Bug in test-patch.sh and precommit build process (Kihwal Lee
     via jlowe)
 
-    HADOOP-9121. InodeTree.java has redundant check for vName while 
-    throwing exception. (Arup Malakar via suresh)
-
     HADOOP-9131. Turn off TestLocalFileSystem#testListStatusWithColons on
     Windows. (Chris Nauroth via suresh)
 
@@ -1826,6 +1823,9 @@ Release 2.7.3 - UNRELEASED
     HADOOP-8818. Use equals instead == in MD5MD5CRC32FileChecksum
     and TFileDumper. (Brandon Li via suresh)
 
+    HADOOP-9121. InodeTree.java has redundant check for vName while
+    throwing exception. (Arup Malakar via suresh)
+
 Release 2.7.2 - 2016-01-25
 
   INCOMPATIBLE CHANGES