Fix checkstyle errors

(cherry picked from commit bd98343b9c)

reactive/webflux/java/method/src/integTest/java/example/HelloMethodApplicationITests.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package example;
 
 import java.util.function.Consumer;

reactive/webflux/java/method/src/test/java/example/HelloMethodApplicationTests.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package example;
 
 import org.junit.jupiter.api.Test;