fix outdated admission option

[fisherxu]

This change is 

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: fisherxu
To fully approve this pull request, please assign additional approvers.
We suggest the following additional approver: caesarxuchao

Assign the PR to them by writing /assign @caesarxuchao in a comment when ready.

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 OWNERS Files:

• docs/admin/extensible-admission-controllers.md/OWNERS

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

[fisherxu]

/assign @chenopis

[k8sio-netlify-preview-bot]

Deploy preview for kubernetes-io-master-staging ready!

Built with commit 4afb06d

https://deploy-preview-7297--kubernetes-io-master-staging.netlify.com

[xiangpengzhao]

For those who want to get the context, ref: kubernetes/kubernetes#58123

[tengqm]

should go to the release-1.10 branch.

[tengqm]

Also mention "closes: #7235"

[fisherxu]

@tengqm go to the release-1.10?

[tengqm]

@fisherxu yes, this change is to be released in 1.10, so should not be proposed to master branch.

[k8s-ci-robot]

Thanks for your pull request. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please follow instructions at https://git.k8s.io/community/CLA.md#the-contributor-license-agreement to sign the CLA.

It may take a couple minutes for the CLA signature to be fully registered; after that, please reply here with a new comment and we'll verify. Thanks.

---

• If you've already signed a CLA, it's possible we don't have your GitHub username or you're using a different email address. Check your existing CLA data and verify that your email is set on your git commits.
• If you signed the CLA as a corporation, please sign in with your organization's credentials at https://identity.linuxfoundation.org/projects/cncf to be authorized.
• If you have done the above and are still having issues with the CLA being reported as unsigned, please email the CNCF helpdesk: helpdesk@rt.linuxfoundation.org

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[chenopis]

When I try to change the base branch, it introduces a deluge of commits. This PR should be rebased, or we should reimplement it in a separate PR that is targeted at release-1.10.

[chenopis]

/hold

[Bradamant3]

Looks as though this issue was fixed in another PR. Closing unmerged.