Make sure that the underlying GoatHillsFinancial lesson remains hidden

Naturally, we want derived classes to be visible automatically


git-svn-id: http://webgoat.googlecode.com/svn/trunk@164 4033779f-a91e-0410-96ef-6bf7bf53c507

webgoat/main/project/JavaSource/org/owasp/webgoat/lessons/GoatHillsFinancial/GoatHillsFinancial.java

@@ -313,7 +313,7 @@ public class GoatHillsFinancial extends RandomLessonAdapter
     
     @Override
 	protected boolean getDefaultHidden() {
-		return false;
+		return getClass().equals(GoatHillsFinancial.class);
 	}
 
 	public Element getCredits()