Merge branch '3.1.x' into fix-1757

Author: wind57

spring-cloud-kubernetes-test-support/src/main/java/org/springframework/cloud/kubernetes/integration/tests/commons/native_client/Util.java

@@ -59,6 +59,7 @@
 import org.springframework.cloud.kubernetes.integration.tests.commons.Images;
 import org.springframework.cloud.kubernetes.integration.tests.commons.Phase;
 
+import static org.assertj.core.api.Fail.fail;
 import static org.awaitility.Awaitility.await;
 import static org.springframework.cloud.kubernetes.integration.tests.commons.Commons.loadImage;
 import static org.springframework.cloud.kubernetes.integration.tests.commons.Commons.pomVersion;