Change ingress sg tag to VoyagerCluster from KubernetesCluster

[tamalsaha]

ref #372

From @greg-jaunt ,

Kubernetes requires that only one SG with a KubernetesCluster tag can be assigned to one node/instance. When I try to deploy another Kubernetes service I get:
Error creating load balancer (will retry): Failed to create load balancer for service default/lease-external: Multiple tagged security groups found for instance i-0d3da7988c4d5aa98; ensure only the k8s security group is tagged. If I remove the KubernetesCluster tag from the Voyager-managed Ingress security group the error goes away.

[tamalsaha]

The fix is to instead of calling addfilter(), directly add a tag tag:VoyagerCluster:<name>