Kubernetes: global network policy allows any egress

[YuryHrytsuk]

$ kubectl get globalnetworkpolicy -o yaml

...
    egress:
    - action: Allow
      destination:
        ports:
        - 53
        selector: k8s-app == "kube-dns"
      protocol: UDP
      source: {}
    - action: Allow
      destination: {}
      protocol: UDP
      source: {}
    - action: Allow
      destination:
        ports:
        - 53
        selector: k8s-app == "kube-dns"
      protocol: TCP
      source: {}
    - action: Allow
      destination: {}
      protocol: TCP
      source: {}
...

[mrnicegyu11]

reopening due to #1227 (comment)