ProcessFiles doesn't work with Travis CI

Author: BruceEckel

onjava/ProcessFiles.java

@@ -2,6 +2,7 @@
 // (c)2017 MindView LLC: see Copyright.txt
 // We make no guarantees that this code is fit for any purpose.
 // Visit http://OnJava8.com for more book information.
+// {ExcludeFromTravisCI}
 // {java onjava.ProcessFiles}
 package onjava;
 import java.io.*;