📍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>

data-transfer-object/src/main/java/com/iluwatar/datatransfer/App.java

@@ -31,8 +31,7 @@ import com.iluwatar.datatransfer.product.ProductResource;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import lombok.extern.slf4j.Slf4j;
 
 /**
  * The Data Transfer Object pattern is a design pattern in which an data transfer object is used to
@@ -50,10 +49,9 @@ import org.slf4j.LoggerFactory;
  * thought as a traditional example and the second is an enum based implementation.
  *
  */
+@Slf4j
 public class App {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
-
   /**
    * Method as act client and request to server for details.
    *