Java 16 migration for Web examples.

See #606.

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

@@ -17,18 +17,16 @@ package example.users;
 
 
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
+
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.test.context.junit.jupiter.SpringExtension;
 
 /**
  * @author Oliver Gierke
  * @author Divya Srivastava
  */
-@ExtendWith(SpringExtension.class)
 @SpringBootTest
-public class ApplicationTests {
+class ApplicationTests {
 
 	@Test
-	public void contextBootstraps() {}
+	void contextBootstraps() {}
 }