Adding release 2.7.1 to CHANGES.txt

(cherry picked from commit 623fd46c1eac057ea9bc4b503a47ad1a831cdacf)

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

@@ -70,6 +70,18 @@ Release 2.8.0 - UNRELEASED
     HADOOP-11800. Clean up some test methods in TestCodec.java.
     (Brahma Reddy Battula via aajisaka)
 
+Release 2.7.1 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
 Release 2.7.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

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

@@ -145,6 +145,18 @@ Release 2.8.0 - UNRELEASED
     HDFS-8096. DatanodeMetrics#blocksReplicated will get incremented early and
     even for failed transfers (vinayakumarb)
 
+Release 2.7.1 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
 Release 2.7.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/CHANGES.txt

@@ -82,6 +82,18 @@ Release 2.8.0 - UNRELEASED
     MAPREDUCE-6266. Job#getTrackingURL should consistently return a proper URL
     (rchiang via rkanter)
 
+Release 2.7.1 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
 Release 2.7.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/CHANGES.txt

@@ -117,6 +117,18 @@ Release 2.8.0 - UNRELEASED
     YARN-3465. Use LinkedHashMap to preserve order of resource requests. 
     (Zhihai Xu via kasha)
 
+Release 2.7.1 - UNRELEASED
+
+  INCOMPATIBLE CHANGES
+
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
 Release 2.7.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES