Initial support for multi kubernetes clusters for k8s nodes

Change-Id: I6ca132898f8e157e0583de38a637fdc135f21d6f
(cherry picked from commit e2a04cedde73618ef24575e70cb221e03854de1d)
diff --git a/apps/k8s-node/app/src/main/resources/definitions/K8sNode.json b/apps/k8s-node/app/src/main/resources/definitions/K8sNode.json
index 4351616..2e2cc37 100644
--- a/apps/k8s-node/app/src/main/resources/definitions/K8sNode.json
+++ b/apps/k8s-node/app/src/main/resources/definitions/K8sNode.json
@@ -9,6 +9,7 @@
       "items": {
         "type": "object",
         "required": [
+          "clusterName",
           "hostname",
           "type",
           "managementIp",
@@ -16,6 +17,10 @@
           "integrationBridge"
         ],
         "properties": {
+          "clusterName": {
+            "type": "string",
+            "example": "kubernetes"
+          },
           "hostname": {
             "type": "string",
             "example": "host1"