Fix Checkstyle

Author: ayushtkn

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDistributedFileSystem.java

@@ -1595,7 +1595,7 @@ public void testListFilesRecursive() throws IOException {
 
   private static RemoteIterator<LocatedFileStatus> getMockedIterator(Path subDir1) {
     return new RemoteIterator<LocatedFileStatus>() {
-      int remainingEntries = 1;
+      private int remainingEntries = 1;
 
       @Override
       public boolean hasNext() throws IOException {