Renamed releases. 2.2.1 -> 2.3.0 & 2.3.0 -> 2.4.0

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.3@1547141 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -1,6 +1,6 @@
 Hadoop Change Log
 
-Release 2.2.1 - UNRELEASED
+Release 2.3.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES
 

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

@@ -1,7 +1,7 @@
 
 Hadoop HDFS Change Log
 
-Release 2.2.1 - UNRELEASED
+Release 2.3.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES
 

hadoop-mapreduce-project/CHANGES.txt

@@ -1,6 +1,6 @@
 Hadoop MapReduce Change Log
 
-Release 2.2.1 - UNRELEASED
+Release 2.3.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES
 

hadoop-yarn-project/CHANGES.txt

@@ -1,6 +1,6 @@
 Hadoop YARN Change Log
 
-Release 2.2.1 - UNRELEASED
+Release 2.3.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES