kubeadm: fix issue with missing kubeproxy fields in test data

[neolit123]

What this PR does / why we need it:

This patch introduced changes in kubeproxy's v1alpha1 that did were not reflected completely in our test data files for non-linux platforms:
164f79e

The change should be applied for both linux and non-linux platforms.

Which issue(s) this PR fixes:

NONE

Special notes for your reviewer:
NONE

Does this PR introduce a user-facing change?:

NONE

/assign @bart0sh @yagonobre
please test if this works for you on OSX.

@kubernetes/sig-cluster-lifecycle-pr-reviews
/kind bug
/priority important-longterm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: neolit123

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• cmd/kubeadm/OWNERS [neolit123]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[bart0sh]

did you test it on windows?

[neolit123]

did you test it on windows?

no, it should just work as the field was intended for windows.

[bart0sh]

would make sense to test it on all platforms I guess

[neolit123]

@bart0sh
kubeadm does not support Windows. our unit tests are broken for a variety of reasons - just tested.
EDIT: next cycle we need to start working on this: kubernetes/kubeadm#1393

were you able to verify if this patch works on OSX?

[bart0sh]

yes, verified on Linux and OSX
/lgtm