Is it possible to show a custom error message in a custom login module with JAAS in EAP 7.2?

Does the solution described on https://access.redhat.com/solutions/3190602 still work with EAP 7.2? How do you get error from out of the error page?

I am working on upgrading from Jboss 5.1 to 7.2 and when the LoginModule throw a javax.security.auth.login.LoginException it is going to Form error page. The JSP is checking for error but is null.

E.g.
// 5.1 excp was instance of LoginException, but is null.
Exception ex = (Exception) session.getAttribute("j_exception");

I also tried...
Exception ex = (Exception) request.getAttribute("javax.servlet.error.exception");

Could not find anything in session or request with the error.

In Web.xml:

    
        FORM
        
            /login/login_tile.jsf
            /login/error.jsp
        
    

In Jboss-web.xml:

    java:/jaas/cp-netmark
    mydomain
    
        org.jboss.as.web.security.ExtendedFormAuthenticator
        

In standalone-full.xml:

Context.xml:

I read that the Context.xml is not longer used, and to put in jboss-xml

I tried:

    
       org.jboss.as.web.security.ExtendedFormAuthenticator
       
           includePassword
           false
               
    

Where is the ExtendedFormAuthenticator class to use?