Bumpup kubernetes client from 4.7.1 to 5.0.0 (support up to kubernetes 1.19)

Change-Id: I7555325fd5eee5bbbb7a0a7a5c27bfc2c333fc7f
diff --git a/apps/k8s-networking/app/src/test/java/org/onosproject/k8snetworking/impl/K8sNetworkPolicyManagerTest.java b/apps/k8s-networking/app/src/test/java/org/onosproject/k8snetworking/impl/K8sNetworkPolicyManagerTest.java
index 9642cd2..b3854ba 100644
--- a/apps/k8s-networking/app/src/test/java/org/onosproject/k8snetworking/impl/K8sNetworkPolicyManagerTest.java
+++ b/apps/k8s-networking/app/src/test/java/org/onosproject/k8snetworking/impl/K8sNetworkPolicyManagerTest.java
@@ -18,7 +18,7 @@
 import com.google.common.collect.Lists;
 import com.google.common.util.concurrent.MoreExecutors;
 import io.fabric8.kubernetes.api.model.ObjectMeta;
-import io.fabric8.kubernetes.api.model.networking.NetworkPolicy;
+import io.fabric8.kubernetes.api.model.networking.v1.NetworkPolicy;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;