Creating 2.6.3 entries in CHANGES.txt files.

(cherry picked from commit eadf7b3096cb010eb7f0afd9afd4ae0d67b2645f)

Conflicts:

	hadoop-common-project/hadoop-common/CHANGES.txt
	hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
	hadoop-mapreduce-project/CHANGES.txt
	hadoop-yarn-project/CHANGES.txt

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

@@ -797,7 +797,19 @@ Release 2.7.0 - 2015-04-20
     HADOOP-11837. AuthenticationFilter should destroy SignerSecretProvider in
     Tomcat deployments. (Bowen Zhang via wheat9)
 
-Release 2.6.2 - UNRELEASED
+Release 2.6.3 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+Release 2.6.2 - 2015-10-21
 
   INCOMPATIBLE CHANGES
 

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

@@ -1120,7 +1120,19 @@ Release 2.7.0 - 2015-04-20
       HDFS-7824. GetContentSummary API and its namenode implementation for
       Storage Type Quota/Usage. (Xiaoyu Yao via Arpit Agarwal)
 
-Release 2.6.2 - UNRELEASED
+Release 2.6.3 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+Release 2.6.2 - 2015-10-21
 
   INCOMPATIBLE CHANGES
 

hadoop-mapreduce-project/CHANGES.txt

@@ -266,7 +266,19 @@ Release 2.7.0 - 2015-04-20
     MAPREDUCE-6285. ClientServiceDelegate should not retry upon
     AuthenticationException. (Jonathan Eagles via ozawa)
 
-Release 2.6.2 - UNRELEASED
+Release 2.6.3 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+Release 2.6.2 - 2015-10-21
 
   INCOMPATIBLE CHANGES
 

hadoop-yarn-project/CHANGES.txt

@@ -853,7 +853,19 @@ Release 2.7.0 - 2015-04-20
     YARN-3466. Fix RM nodes web page to sort by node HTTP-address, #containers 
     and node-label column (Jason Lowe via wangda)
 
-Release 2.6.2 - UNRELEASED
+Release 2.6.3 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+Release 2.6.2 - 2015-10-21
 
   INCOMPATIBLE CHANGES