Adopt Spring Java Format's JUnit 5 check

Closes gh-941

initializr-actuator/src/test/java/io/spring/initializr/actuate/stat/MainControllerStatsIntegrationTests.java

@@ -56,7 +56,7 @@ class MainControllerStatsIntegrationTests extends AbstractFullStackInitializrInt
 	private ProjectGenerationStatPublisher projectGenerationStatPublisher;
 
 	@BeforeEach
-	public void setup() {
+	void setup() {
 		this.statsMockController.stats.clear();
 		// Make sure our mock is going to be invoked with the stats
 		this.projectGenerationStatPublisher

initializr-actuator/src/test/java/io/spring/initializr/actuate/stat/ProjectGenerationStatPublisherTests.java

@@ -76,7 +76,7 @@ class ProjectGenerationStatPublisherTests {
 	private MockRestServiceServer mockServer;
 
 	@BeforeEach
-	public void setUp() {
+	void setUp() {
 		configureService(createProperties());
 	}