For LoadBalancer type service:
- Verifies corresponding firewall rule has correct sourceRanges, ports
  & protocols, target tags.
- Verifies requests can reach all expected instances.
- Verifies requests can not reach instances that are not included.

For Ingress resrouce:
- Verifies the ingress firewall rule has correct sourceRanges, target
  tags and tcp ports.

For general e2e cluster:
- Verifies all required firewall rules has correct sourceRange, ports
  & protocols, source tags and target tags.
- Verifies well know ports on master and nodes are not
  exposed externally