📍Use lombok, reformat, and optimize the code (#1560)

* Use lombok, reformat, and optimize the code

* Fix merge conflicts and some sonar issues

Co-authored-by: va1m <va1m@email.com>

queue-load-leveling/src/test/java/com/iluwatar/queue/load/leveling/MessageQueueTest.java

@@ -30,10 +30,10 @@ import org.junit.jupiter.api.Test;
 /**
  * Test case for submitting and retrieving messages from Blocking Queue.
  */
-public class MessageQueueTest {
+class MessageQueueTest {
 
   @Test
-  public void messageQueueTest() {
+  void messageQueueTest() {
 
     var msgQueue = new MessageQueue();
 

queue-load-leveling/src/test/java/com/iluwatar/queue/load/leveling/MessageTest.java

@@ -30,10 +30,10 @@ import org.junit.jupiter.api.Test;
 /**
  * Test case for creating and checking the Message.
  */
-public class MessageTest {
+class MessageTest {
 
   @Test
-  public void messageTest() {
+  void messageTest() {
 
     // Parameterized constructor test.
     var testMsg = "Message Test";