📍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>

lazy-loading/src/test/java/com/iluwatar/lazy/loading/AbstractHolderTest.java

@@ -23,14 +23,14 @@
 
 package com.iluwatar.lazy.loading;
 
-import org.junit.jupiter.api.Test;
-
 import static java.time.Duration.ofMillis;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertSame;
 import static org.junit.jupiter.api.Assertions.assertTimeout;
 
+import org.junit.jupiter.api.Test;
+
 /**
  * Date: 12/19/15 - 11:58 AM
  *
@@ -56,7 +56,7 @@ public abstract class AbstractHolderTest {
    * This test shows that the heavy field is not instantiated until the method getHeavy is called
    */
   @Test
-  public void testGetHeavy() throws Exception {
+  void testGetHeavy() throws Exception {
     assertTimeout(ofMillis(3000), () -> {
       assertNull(getInternalHeavyValue());
       assertNotNull(getHeavy());

lazy-loading/src/test/java/com/iluwatar/lazy/loading/AppTest.java

@@ -28,7 +28,7 @@ import org.junit.jupiter.api.Test;
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 
 /**
- * 
+ *
  * Application test
  *
  */