Removing all redundant super constructor calls

cqrs/src/main/java/com/iluwatar/cqrs/domain/model/Author.java

@@ -50,7 +50,6 @@ public class Author {
    *          email of the author
    */
   public Author(String username, String name, String email) {
-    super();
     this.username = username;
     this.name = name;
     this.email = email;

cqrs/src/main/java/com/iluwatar/cqrs/domain/model/Book.java

@@ -43,7 +43,7 @@ public class Book {
   private Author author;
 
   /**
-   * 
+   *
    * @param title
    *          title of the book
    * @param price
@@ -52,7 +52,6 @@ public class Book {
    *          author of the book
    */
   public Book(String title, double price, Author author) {
-    super();
     this.title = title;
     this.price = price;
     this.author = author;

cqrs/src/main/java/com/iluwatar/cqrs/dto/Author.java

@@ -45,7 +45,6 @@ public class Author {
    *          username of the author
    */
   public Author(String name, String email, String username) {
-    super();
     this.name = name;
     this.email = email;
     this.username = username;

cqrs/src/main/java/com/iluwatar/cqrs/dto/Book.java

@@ -42,7 +42,6 @@ public class Book {
    *          price of the book
    */
   public Book(String title, double price) {
-    super();
     this.title = title;
     this.price = price;
   }