HADOOP-14814. Fix incompatible API change on FsServerDefaults to HADOOP-14104. Contributed by Junping Du.

(cherry picked from commit 41480233a9cfb0bcfb69cc0f1594120e7656f031)
(cherry picked from commit 7dd5bb949206fb635d875cd651292b451267a951)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsServerDefaults.java

@@ -60,6 +60,15 @@ public class FsServerDefaults implements Writable {
   public FsServerDefaults() {
   }
 
+  public FsServerDefaults(long blockSize, int bytesPerChecksum,
+      int writePacketSize, short replication, int fileBufferSize,
+      boolean encryptDataTransfer, long trashInterval,
+      DataChecksum.Type checksumType) {
+    this(blockSize, bytesPerChecksum, writePacketSize, replication,
+        fileBufferSize, encryptDataTransfer, trashInterval, checksumType,
+        null, (byte) 0);
+  }
+
   public FsServerDefaults(long blockSize, int bytesPerChecksum,
       int writePacketSize, short replication, int fileBufferSize,
       boolean encryptDataTransfer, long trashInterval,