📍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>

collection-pipeline/src/test/java/com/iluwatar/collectionpipeline/AppTest.java

@@ -27,32 +27,31 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import java.util.List;
 import java.util.Map;
+import lombok.extern.slf4j.Slf4j;
 import org.junit.jupiter.api.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 /**
  * Tests that Collection Pipeline methods work as expected.
  */
-public class AppTest {
-  private static final Logger LOGGER = LoggerFactory.getLogger(AppTest.class);
+@Slf4j
+class AppTest {
 
   private final List<Car> cars = CarFactory.createCars();
 
   @Test
-  public void testGetModelsAfter2000UsingFor() {
+  void testGetModelsAfter2000UsingFor() {
     var models = ImperativeProgramming.getModelsAfter2000(cars);
     assertEquals(List.of("Avenger", "Wrangler", "Focus", "Cascada"), models);
   }
 
   @Test
-  public void testGetModelsAfter2000UsingPipeline() {
+  void testGetModelsAfter2000UsingPipeline() {
     var models = FunctionalProgramming.getModelsAfter2000(cars);
     assertEquals(List.of("Avenger", "Wrangler", "Focus", "Cascada"), models);
   }
 
   @Test
-  public void testGetGroupingOfCarsByCategory() {
+  void testGetGroupingOfCarsByCategory() {
     var modelsExpected = Map.of(
         Category.CONVERTIBLE, List.of(
             new Car("Buick", "Cascada", 2016, Category.CONVERTIBLE),
@@ -74,7 +73,7 @@ public class AppTest {
   }
 
   @Test
-  public void testGetSedanCarsOwnedSortedByDate() {
+  void testGetSedanCarsOwnedSortedByDate() {
     var john = new Person(cars);
     var modelsExpected = List.of(
         new Car("Dodge", "Avenger", 2010, Category.SEDAN),