Fixing CHANGES.txt, moving HADOOP-8815 to 2.6.0 release

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

@@ -232,9 +232,6 @@ Trunk (Unreleased)
     HADOOP-8813. Add InterfaceAudience and InterfaceStability annotations
     to RPC Server and Client classes. (Brandon Li via suresh)
 
-    HADOOP-8815. RandomDatum needs to override hashCode().
-    (Brandon Li via suresh)
-
     HADOOP-8436. NPE In getLocalPathForWrite ( path, conf ) when the
     required context item is not configured
     (Brahma Reddy Battula via harsh)
@@ -704,6 +701,9 @@ Release 2.6.0 - UNRELEASED
     HADOOP-10989. Work around buggy getgrouplist() implementations on Linux that
     return 0 on failure. (cnauroth)
 
+    HADOOP-8815. RandomDatum needs to override hashCode().
+    (Brandon Li via suresh)
+
 Release 2.5.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES