Add node IP attribute in k8s node class with minor code refactoring

Change-Id: I4c1c86c95acfeb38569b91c1677e4ce8af90460f
diff --git a/apps/k8s-node/app/src/test/resources/org/onosproject/k8snode/web/k8s-node-minion-config.json b/apps/k8s-node/app/src/test/resources/org/onosproject/k8snode/web/k8s-node-minion-config.json
index 1e7d4a4..08aa1b1 100644
--- a/apps/k8s-node/app/src/test/resources/org/onosproject/k8snode/web/k8s-node-minion-config.json
+++ b/apps/k8s-node/app/src/test/resources/org/onosproject/k8snode/web/k8s-node-minion-config.json
@@ -6,6 +6,7 @@
       "type" : "MINION",
       "managementIp" : "10.134.231.32",
       "dataIp" : "10.134.34.224",
+      "nodeIp" : "30.30.30.3",
       "integrationBridge" : "of:00000000000000a2",
       "externalBridge" : "of:00000000000000b2"
     }