fix: correct number of solved assignments in report card (#2065)

* fix: correct number of solved assignments in report card

Filter the list of assignments to accurately count the number of solved assignments.

Closes: gh-2063

* chore: remove scoreboard code

This is added when we run a CTF challenge during OWASP AppSecEU in 2017. We can remove this code.

Closes: gh-2064

src/main/java/org/owasp/webgoat/container/MvcConfiguration.java

@@ -53,7 +53,6 @@ public class MvcConfiguration implements WebMvcConfigurer {
     registry.addViewController("/login").setViewName("login");
     registry.addViewController("/lesson_content").setViewName("lesson_content");
     registry.addViewController("/start.mvc").setViewName("main_new");
-    registry.addViewController("/scoreboard").setViewName("scoreboard");
   }
 
   @Bean