HADOOP-14373. License error in org.apache.hadoop.metrics2.util.Servers. Contributed by hu xiaodong.

(cherry picked from commit a5fa954684f517bdf0a50f3fa7a0314f24cc7049)
(cherry picked from commit d9c3c78b7809d48e965046b2f76ac01e70942937)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/util/Servers.java

@@ -1,6 +1,4 @@
-/*
- * Util.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