fix checkstyle

spring-cloud-kubernetes-client-discovery/src/test/java/org/springframework/cloud/kubernetes/client/discovery/KubernetesDiscoveryClientServiceWithoutPortNameTests.java

@@ -35,6 +35,7 @@
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+
 import org.springframework.cloud.client.ServiceInstance;
 import org.springframework.cloud.kubernetes.commons.discovery.KubernetesDiscoveryProperties;