Correct visibility of JUnit 5 lifecycle methods in smoke tests

See gh-17292

spring-boot-smoke-tests/spring-boot-smoke-test-oauth2-resource-server/src/test/java/smoketest/oauth2/resource/SampleOauth2ResourceServerApplicationTests.java

@@ -50,7 +50,7 @@ class SampleOauth2ResourceServerApplicationTests {
 	private TestRestTemplate restTemplate;
 
 	@BeforeAll
-	public static void setup() throws Exception {
+	static void setup() throws Exception {
 		server.start();
 		String url = server.url("/.well-known/jwks.json").toString();
 		server.enqueue(mockResponse());
@@ -58,7 +58,7 @@ class SampleOauth2ResourceServerApplicationTests {
 	}
 
 	@AfterAll
-	public static void shutdown() throws IOException {
+	static void shutdown() throws IOException {
 		server.shutdown();
 		System.clearProperty("spring.security.oauth2.resourceserver.jwt.jwk-set-uri");
 	}

spring-boot-smoke-tests/spring-boot-smoke-test-reactive-oauth2-resource-server/src/test/java/smoketest/oauth2/resource/SampleReactiveOAuth2ResourceServerApplicationTests.java

@@ -43,7 +43,7 @@ class SampleReactiveOAuth2ResourceServerApplicationTests {
 			+ "R44vmRqS5ncrF-1R0EGcPX49U6A";
 
 	@BeforeAll
-	public static void setup() throws Exception {
+	static void setup() throws Exception {
 		server.start();
 		String url = server.url("/.well-known/jwks.json").toString();
 		server.enqueue(mockResponse());
@@ -51,7 +51,7 @@ class SampleReactiveOAuth2ResourceServerApplicationTests {
 	}
 
 	@AfterAll
-	public static void shutdown() throws Exception {
+	static void shutdown() throws Exception {
 		server.shutdown();
 		System.clearProperty("spring.security.oauth2.resourceserver.jwt.jwk-set-uri");
 	}