[KUBEV] Provide default values for k8s_ parameters

Related: PRODX-12687
Change-Id: I28c64bd5bb695440ce84f633850fc1241a3d1de3
diff --git a/hco/top.yaml b/hco/top.yaml
index f8104b2..876fd9a 100644
--- a/hco/top.yaml
+++ b/hco/top.yaml
@@ -84,8 +84,10 @@
     default: ''
   k8s_vip:
     type: string
+    default: ''
   k8s_svc_network_cidr:
     type: string
+    default: ''
 
 conditions: