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/lessons/LessonInfoModel.java

@@ -7,12 +7,6 @@ package org.owasp.webgoat.container.lessons;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 
-/**
- * LessonInfoModel class.
- *
- * @author dm
- * @version $Id: $Id
- */
 @Getter
 @AllArgsConstructor
 public class LessonInfoModel {

src/main/java/org/owasp/webgoat/container/lessons/LessonMenuItem.java

@@ -7,12 +7,6 @@ package org.owasp.webgoat.container.lessons;
 import java.util.ArrayList;
 import java.util.List;
 
-/**
- * LessonMenuItem class.
- *
- * @author rlawson
- * @version $Id: $Id
- */
 public class LessonMenuItem {
 
   private String name;