Switch remaining jUnit4 tests to jUnit jupiter

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignClientBuilderTests.java

@@ -39,6 +39,7 @@ import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 /**
  * @author Sven Döring
  * @author Sam Kruglov
+ * @author Szymon Linowski
  */
 public class FeignClientBuilderTests {
 

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignClientsRegistrarTests.java

@@ -35,6 +35,7 @@ import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
  * @author Spencer Gibb
  * @author Gang Li
  * @author Michal Domagala
+ * @author Szymon Linowski
  */
 public class FeignClientsRegistrarTests {
 

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/SpringDecoderTests.java

@@ -45,6 +45,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 /**
  * @author Spencer Gibb
  * @author Olga Maciaszek-Sharma
+ * @author Szymon Linowski
  */
 @SpringBootTest(classes = SpringDecoderTests.Application.class, webEnvironment = WebEnvironment.RANDOM_PORT,
 		value = { "spring.application.name=springdecodertest", "spring.jmx.enabled=false" })

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/invalid/FeignClientValidationTests.java

@@ -33,6 +33,7 @@ import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 
 /**
  * @author Dave Syer
+ * @author Szymon Linowski
  */
 public class FeignClientValidationTests {
 

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/security/OAuth2FeignRequestInterceptorTests.java

@@ -39,6 +39,7 @@ import static org.mockito.Mockito.when;
 /**
  * @author João Pedro Evangelista
  * @author Tim Ysewyn
+ * @author Szymon Linowski
  */
 public class OAuth2FeignRequestInterceptorTests {
 

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/support/SpringEncoderTests.java

@@ -69,6 +69,7 @@ import static org.springframework.http.MediaType.TEXT_PLAIN_VALUE;
  * @author Olga Maciaszek-Sharma
  * @author Ahmad Mozafarnia
  * @author Can Bezmen
+ * @author Szymon Linowski
  */
 @SpringBootTest(classes = SpringEncoderTests.Application.class, webEnvironment = WebEnvironment.RANDOM_PORT,
 		value = { "spring.application.name=springencodertest", "spring.jmx.enabled=false" })

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/support/SpringMvcContractTests.java

@@ -74,6 +74,7 @@ import static org.junit.jupiter.api.Assumptions.assumeTrue;
  * @author Aaron Whiteside
  * @author Artyom Romanenko
  * @author Olga Maciaszek-Sharma
+ * @author Szymon Linowski
  */
 public class SpringMvcContractTests {