fix: fix a potential data race issue in unit test

[nilo19]

What type of PR is this?

/kind bug

What this PR does / why we need it:

fix: fix a potential data race issue in unit test

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

fix: fix a potential data race issue in unit test

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[andyzhangx]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx, nilo19

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

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Needs approval from an approver in each of these files:

• OWNERS [andyzhangx,nilo19]

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[coveralls]

Coverage increased (+0.04%) to 80.35% when pulling 99d7323 on nilo19:fix/race into 0e62f25 on kubernetes-sigs:master.

[feiskyer]

/lgtm
/retest

[MartinForReal]

/cherrypick release-1.1

[MartinForReal]

/cherrypick release-1.0

[k8s-infra-cherrypick-robot]

@MartinForReal: new pull request could not be created: failed to create pull request against kubernetes-sigs/cloud-provider-azure#release-1.1 from head k8s-infra-cherrypick-robot:cherry-pick-848-to-release-1.1: status code 422 not one of [201], body: {"message":"Validation Failed","errors":[{"resource":"PullRequest","code":"custom","message":"No commits between kubernetes-sigs:release-1.1 and k8s-infra-cherrypick-robot:cherry-pick-848-to-release-1.1"}],"documentation_url":"https://docs.github.com/rest/reference/pulls#create-a-pull-request"}

In response to this:

/cherrypick release-1.1

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.

[k8s-infra-cherrypick-robot]

@MartinForReal: new pull request could not be created: failed to create pull request against kubernetes-sigs/cloud-provider-azure#release-1.0 from head k8s-infra-cherrypick-robot:cherry-pick-848-to-release-1.0: status code 422 not one of [201], body: {"message":"Validation Failed","errors":[{"resource":"PullRequest","code":"custom","message":"No commits between kubernetes-sigs:release-1.0 and k8s-infra-cherrypick-robot:cherry-pick-848-to-release-1.0"}],"documentation_url":"https://docs.github.com/rest/reference/pulls#create-a-pull-request"}

In response to this:

/cherrypick release-1.0

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.