Moved HADOOP-8818 from 3.0.0 to 2.7.3 in CHANGES.txt.

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

@@ -363,9 +363,6 @@ Trunk (Unreleased)
     HADOOP-8767. Secondary namenode is started on slave nodes instead of
     master nodes. (Giovanni Delussu via suresh)
 
-    HADOOP-8818. Use equals instead == in MD5MD5CRC32FileChecksum
-    and TFileDumper. (Brandon Li via suresh)
-
     HADOOP-8821. Fix findbugs warning related to concatenating string in a 
     for loop in Configuration#dumpDeprecatedKeys(). (suresh)
 
@@ -1812,6 +1809,9 @@ Release 2.7.3 - UNRELEASED
     HADOOP-12792. TestUserGroupInformation#testGetServerSideGroups fails in
     chroot (Eric Badger via jlowe)
 
+    HADOOP-8818. Use equals instead == in MD5MD5CRC32FileChecksum
+    and TFileDumper. (Brandon Li via suresh)
+
 Release 2.7.2 - 2016-01-25
 
   INCOMPATIBLE CHANGES