add node labels arg to windows setup script

[JamesEarle]

@jackfrancis @JiangtianLi

Addresses #563

Adding KUBELET_NODE_LABELS to ArgList, need to figure out how to access the GetAgentKubernetesLabels function from here, if possible

[codecov]

Codecov Report

Merging #2770 into master will decrease coverage by <.01%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master    #2770      +/-   ##
==========================================
- Coverage   46.82%   46.81%   -0.01%     
==========================================
  Files          86       86              
  Lines       12774    12776       +2     
==========================================
  Hits         5981     5981              
- Misses       6249     6250       +1     
- Partials      544      545       +1

Impacted Files	Coverage Δ
pkg/acsengine/engine.go	62.76% <83.33%> (+0.03%)	⬆️
pkg/operations/kubernetesupgrade/upgrader.go	56.48% <0%> (-0.84%)	⬇️

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[JiangtianLi]

@JamesEarle Thanks for fixing this. It is hard to see the diff, possibly due to line endings. Can you fix it?

[JamesEarle]

@JiangtianLi my changes are the additions from line 294-299, adding "--node-labels `$KUBELET_NODE_LABELS" to the args list. I haven't completed this though, as I'm not sure how to access the func GetAgentKubernetesLabels in engine.go from the kuberneteswindowssetup.ps1, specifically in the Write-KubernetesStartFiles.

Do you know if I can do this? Working with Jack on it.

[JamesEarle]

@JiangtianLi the changes should be easier to see in the most recent commit.

[JiangtianLi]

@JamesEarle You can take a look at how windowsTelemetryGUID is passed to ps1.

[CecileRobertMichon]

lgtm