Polish away public modifier on tests

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/neo4j/Neo4jReactiveHealthIndicatorIntegrationTests.java

@@ -44,7 +44,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 @SpringBootTest
 @Testcontainers(disabledWithoutDocker = true)
-public class Neo4jReactiveHealthIndicatorIntegrationTests {
+class Neo4jReactiveHealthIndicatorIntegrationTests {
 
 	// gh-33428
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/elasticsearch/ElasticsearchClientAutoConfigurationTests.java

@@ -41,7 +41,7 @@ import static org.mockito.Mockito.mock;
  *
  * @author Andy Wilkinson
  */
-public class ElasticsearchClientAutoConfigurationTests {
+class ElasticsearchClientAutoConfigurationTests {
 
 	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
 			.withConfiguration(AutoConfigurations.of(ElasticsearchClientAutoConfiguration.class));

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/graphql/GraphQlTestIntegrationTest.java

@@ -27,7 +27,7 @@ import org.springframework.graphql.test.tester.GraphQlTester;
  * @author Brian Clozel
  */
 @GraphQlTest(BookController.class)
-public class GraphQlTestIntegrationTest {
+class GraphQlTestIntegrationTest {
 
 	@Autowired
 	private GraphQlTester graphQlTester;

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/info/OsInfoTests.java

@@ -25,7 +25,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Jonatan Ivanov
  */
-public class OsInfoTests {
+class OsInfoTests {
 
 	@Test
 	void osInfoIsAvailable() {

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/embedded/undertow/UndertowWebServerRuntimeHintsTests.java

@@ -32,7 +32,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class UndertowWebServerRuntimeHintsTests {
+class UndertowWebServerRuntimeHintsTests {
 
 	@Test
 	void registersHints() throws ClassNotFoundException {