Refactoring resolv.conf

- Renaming templates for netchecker
- Add dnsPolicy: ClusterFirstWithHostNet to kube-proxy

Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>

roles/kubernetes/node/templates/manifests/kube-proxy.manifest.j2

@@ -7,6 +7,9 @@ metadata:
     k8s-app: kube-proxy
 spec:
   hostNetwork: true
+{% if kube_version | version_compare('v1.6', '>=') %}
+  dnsPolicy: ClusterFirstWithHostNet
+{% endif %}
   containers:
   - name: kube-proxy
     image: {{ hyperkube_image_repo }}:{{ hyperkube_image_tag }}