Move back to JUnit 4 until SUREFIRE-1614 has been resolved

See gh-14736
See gh-14737
See gh-14738

spring-boot-samples/spring-boot-sample-actuator-custom-security/src/test/java/sample/actuator/customsecurity/CorsSampleActuatorApplicationTests.java

@@ -19,8 +19,9 @@ package sample.actuator.customsecurity;
 import java.net.URI;
 import java.util.Map;
 
-import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Test;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
@@ -32,6 +33,7 @@ import org.springframework.http.HttpStatus;
 import org.springframework.http.RequestEntity;
 import org.springframework.http.ResponseEntity;
 import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.junit4.SpringRunner;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -40,7 +42,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Madhura Bhave
  */
-
+@RunWith(SpringRunner.class)
 @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
 @ActiveProfiles("cors")
 public class CorsSampleActuatorApplicationTests {
@@ -50,7 +52,7 @@ public class CorsSampleActuatorApplicationTests {
 	@Autowired
 	private ApplicationContext applicationContext;
 
-	@BeforeEach
+	@Before
 	public void setUp() {
 		RestTemplateBuilder builder = new RestTemplateBuilder();
 		LocalHostUriTemplateHandler handler = new LocalHostUriTemplateHandler(

spring-boot-samples/spring-boot-sample-actuator-custom-security/src/test/java/sample/actuator/customsecurity/ManagementPortAndPathSampleActuatorApplicationTests.java

@@ -16,7 +16,8 @@
 
 package sample.actuator.customsecurity;
 
-import org.junit.jupiter.api.Test;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import org.springframework.boot.actuate.autoconfigure.web.server.LocalManagementPort;
 import org.springframework.boot.test.context.SpringBootTest;
@@ -25,6 +26,7 @@ import org.springframework.boot.test.web.client.TestRestTemplate;
 import org.springframework.boot.web.server.LocalServerPort;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -34,7 +36,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Dave Syer
  * @author Madhura Bhave
  */
-
+@RunWith(SpringRunner.class)
 @SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT, properties = {
 		"management.server.port=0",
 		"management.server.servlet.context-path=/management" })

spring-boot-samples/spring-boot-sample-actuator-custom-security/src/test/java/sample/actuator/customsecurity/SampleActuatorCustomSecurityApplicationTests.java

@@ -18,7 +18,8 @@ package sample.actuator.customsecurity;
 
 import java.util.Map;
 
-import org.junit.jupiter.api.Test;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
@@ -27,6 +28,7 @@ import org.springframework.boot.test.web.client.TestRestTemplate;
 import org.springframework.core.env.Environment;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -34,7 +36,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Madhura Bhave
  * @author Stephane Nicoll
  */
-
+@RunWith(SpringRunner.class)
 @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
 public class SampleActuatorCustomSecurityApplicationTests {