Change "0.23.3" to "2.0.0" in CHANGES.txt files.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1306538 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -113,7 +113,7 @@ Trunk (unreleased changes)
 
     HADOOP-7761. Improve the performance of raw comparisons. (todd)
 
-Release 0.23.3 - UNRELEASED 
+Release 2.0.0 - UNRELEASED 
 
   INCOMPATIBLE CHANGES
 

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

@@ -109,7 +109,7 @@ Trunk (unreleased changes)
 
     HDFS-3116. Typo in fetchdt error message. (AOE Takashi via atm)
 
-Release 0.23.3 - UNRELEASED 
+Release 2.0.0 - UNRELEASED 
 
   INCOMPATIBLE CHANGES
 

hadoop-mapreduce-project/CHANGES.txt

@@ -96,7 +96,7 @@ Trunk (unreleased changes)
     MAPREDUCE-1740. NPE in getMatchingLevelForNodes when node locations are 
     variable depth (ahmed via tucu) [IMPORTANT: this is dead code in trunk]
 
-Release 0.23.3 - UNRELEASED
+Release 2.0.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES