add node affinity for cluster-autoscaler

[c4tz]

What this PR does / why we need it:
As discussed in #1713, it adds node affinity to the cluster-autoscaler addon.

Which issue(s) this PR fixes: None

Special notes for your reviewer: -

Does this PR introduce a user-facing change?: No.

NONE

[kubermatic-bot]

Hi @c4tz. Thanks for your PR.

I'm waiting for a kubermatic member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[kron4eg]

/approve

[kubermatic-bot]

LGTM label has been added.

Git tree hash: 0d7f5a5364479aadd60cc5aa5f23a99c75977d18

[xmudrii]

/retest

[xmudrii]

/lgtm
/approve

[kubermatic-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: c4tz, kron4eg, xmudrii

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• OWNERS [kron4eg,xmudrii]

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[xmudrii]

/retest

[xmudrii]

/retest