Polishing

Adding `@author` tags to modified files.
Remove Hamcrest usage.

Original pull request #602
Related tickest #583

web/querydsl/src/test/java/example/users/ApplicationTests.java

@@ -23,6 +23,7 @@ import org.springframework.test.context.junit.jupiter.SpringExtension;
 
 /**
  * @author Oliver Gierke
+ * @author Divya Srivastava
  */
 @ExtendWith(SpringExtension.class)
 @SpringBootTest