kube-dns should be first and only DNS server for Windows pods

[PatrickLang]

Is this an ISSUE or FEATURE REQUEST? (choose one): Issue

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Which release version?: v1.0.3

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Which component (CNI/IPAM/CNM/CNS): CNI

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Which Operating System (Linux/Windows):

Windows Server version 1803

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Which Orchestrator and version (e.g. Kubernetes, Docker)
Kubernetes

What happened:

168.x.x.x was first in the DNS server list. It can't resolve DNS within the k8s cluster.

What you expected to happen:

On Linux, 10.0.0.10 is the first and only server. This should be the same on Windows

/etc # cat resolv.conf
nameserver 10.0.0.10
search default.svc.cluster.local svc.cluster.local cluster.local lje1130gi5iehkdbexza4ptcba.xx.internal.cloudapp.net

How to reproduce it (as minimally and precisely as possible):
Deploy a Windows cluster using acs-engine v0.17

[sharmasushant]

#155 fixes this