Revert "bump: k8s.io/kubernetes"

[stbenjam]

Since #26935 merged, this test has tanked, and the failures are blocking release payloads:

[sig-network] NetworkPolicyLegacy [LinuxOnly] NetworkPolicy between server and client should enforce egress policy allowing traffic to a server in a different namespace based on PodSelector and NamespaceSelector [Feature:NetworkPolicy] [Skipped:Network/OpenShiftSDN/Multitenant] [Suite:openshift/conformance/parallel] [Suite:k8s]

Example job failure: https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.11-e2e-metal-ipi/1508215764547538944

See results here.

Please base any fix on an unrevert, and run the /payload 4.11 nightly blocking to ensure the blocking jobs pass (docs: https://docs.ci.openshift.org/docs/release-oversight/payload-testing/)

[dgoodwin]

/lgtm
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dgoodwin, stbenjam

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[stbenjam]

Based on our slack discussion, this was caused by openshift/kubernetes#1201. Feel free to revert 1201 if that's the fix, and then revendor o/k -- but base your origin revendor PR assuming this will have landed by then.

[deads2k]

Clean revert of the last PR merged. merging to unstick master.

[openshift-ci]

@stbenjam: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-gcp	11bf155	link	true	/test e2e-gcp
ci/prow/e2e-gcp-builds	11bf155	link	true	/test e2e-gcp-builds
ci/prow/e2e-gcp-upgrade	11bf155	link	true	/test e2e-gcp-upgrade
ci/prow/e2e-gcp-csi	11bf155	link	false	/test e2e-gcp-csi

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