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/api/src/main/java/org/onosproject/k8snetworking/api/K8sNetworkPolicyAdminService.java b/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/K8sNetworkPolicyAdminService.java
index 2c5bb48..1e87322 100644
--- a/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/K8sNetworkPolicyAdminService.java
+++ b/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/K8sNetworkPolicyAdminService.java
@@ -15,7 +15,8 @@
  */
 package org.onosproject.k8snetworking.api;
 
-import io.fabric8.kubernetes.api.model.networking.NetworkPolicy;
+
+import io.fabric8.kubernetes.api.model.networking.v1.NetworkPolicy;
 
 /**
  * Service for administering the inventory of kubernetes network policy.