HBASE-19986 If HBaseTestClassRule timesout a test, thread dump; ADDENDUM; white-space, checkstyle, and rb feedback by Duo

hbase-common/src/test/java/org/apache/hadoop/hbase/HBaseClassTestRule.java

@@ -1,4 +1,4 @@
-/*
+/**
  * 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

hbase-common/src/test/java/org/apache/hadoop/hbase/TestTimeout.java

@@ -46,14 +46,11 @@ public class TestTimeout {
       Thread t = new Thread("HangingThread") {
         public void run() {
           synchronized(this) {
-            while(true) {
-            }
+            while(true) {}
           }
         }
       };
       t.start();
-      while (true) {
-        // Just hang out too.
-      }
+      while (true) {}
    }
 }