suppressing some useless log messages and banners in unit tests (#752)

* suppressing some useless log messages and banners in unit tests

* some more log suppressed

webgoat-lessons/missing-function-ac/src/main/java/org/owasp/webgoat/missing_ac/MissingFunctionACUsers.java

@@ -32,6 +32,8 @@ import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.ResponseBody;
 import org.springframework.web.servlet.ModelAndView;
 
+import lombok.extern.slf4j.Slf4j;
+
 import javax.servlet.http.HttpServletRequest;
 import java.util.ArrayList;
 import java.util.List;
@@ -41,6 +43,7 @@ import java.util.List;
  */
 
 @Controller
+@Slf4j
 public class MissingFunctionACUsers {
 
     // this will actually put controllers on the /WebGoat/* path ... the jsp for list_users restricts what can be seen, but the add_user is not controlled carefully
@@ -84,8 +87,7 @@ public class MissingFunctionACUsers {
             userService.addUser(newUser.getUsername(),newUser.getPassword(),newUser.getRole());
             return userService.loadUserByUsername(newUser.getUsername());
         } catch (Exception ex) {
-            System.out.println("Error creating new User" + ex.getMessage());
-            ex.printStackTrace();
+            log.error("Error creating new User", ex);
             //TODO: implement error handling ...
         } finally {
             // no streams or other resources opened ... nothing to do, right?