HDFS-11905. Fix license header inconsistency in hdfs. Contributed by Yeliang Cang.

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

@@ -1,6 +1,4 @@
-/*
- * UpgradeUtilities.java
- *
+/**
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information