Use AbstractLesson.getLink() and getFormAction() more

Rather than constructing URL's manually all the time, rather
make use of existing mechanisms to create the URL, and use
it consistently.


git-svn-id: http://webgoat.googlecode.com/svn/trunk@184 4033779f-a91e-0410-96ef-6bf7bf53c507

webgoat/main/project/WebContent/lessons/SQLInjection/ListStaff.jsp

@@ -11,7 +11,7 @@
 		<br>
 		<p>Select from the list below	</p>
 
-		<form id="form1" name="form1" method="post" action="attack?menu=<%=webSession.getCurrentMenu()%>">
+		<form id="form1" name="form1" method="post" action="<%=webSession.getCurrentLesson().getFormAction()%>">
   <table width="60%" border="0" cellpadding="3">
     <tr>
       <td>  <label>