Kubernetes: get img from acs-mirror

[jackfrancis]

What this PR does / why we need it: Source img binary from Azure CDN

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

If applicable:

• documentation
• unit tests
• tested backward compatibility (ie. deploy with previous version, upgrade with this branch)

Release note:

get img from acs-mirror

[jackfrancis]

@jessfraz @CecileRobertMichon FYI

[CecileRobertMichon]

/lgtm

[acs-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: CecileRobertMichon, jackfrancis

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[jessfraz]

thanks!

…

On Wed, Jun 20, 2018 at 4:59 PM Azure Container Service Bot < ***@***.***> wrote: [APPROVALNOTIFIER] This PR is *APPROVED* This pull-request has been approved by: *CecileRobertMichon <#3318 (review)>*, *jackfrancis <#3318#>* The full list of commands accepted by this bot can be found here <https://go.k8s.io/bot-commands>. The pull request process is described here <https://git.k8s.io/community/contributors/guide/owners.md#the-code-review-process> Needs approval from an approver in each of these files: - OWNERS <https://github.com/Azure/acs-engine/blob/master/OWNERS> [CecileRobertMichon,jackfrancis] Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#3318 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABYNbCzcYh462qPAXB8WYFsXN5Nxm7Znks5t-reygaJpZM4Uv9Ka> .

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