chore: update Java version in README (#2091)

Closes: gh-2072

* chore: add Maven wrapper jar file

This way we don't download it every time from a Maven repository saving some band with.

* chore: remove @authors tag

src/main/java/org/owasp/webgoat/container/service/LessonProgressService.java

@@ -18,11 +18,6 @@ import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.ResponseBody;
 
-/**
- * LessonProgressService class.
- *
- * @author webgoat
- */
 @Controller
 @RequiredArgsConstructor
 public class LessonProgressService {