Update junit_test.go

[minzhuogoogle]

Update testcase for added/modified data in junit file.

[google-oss-prow[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: minzhuogoogle Once this PR has been reviewed and has the lgtm label, please assign michelle192837 for approval. For more information see the Kubernetes Code Review Process.

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[google-oss-prow[bot]]

Hi @minzhuogoogle. Thanks for your PR.

I'm waiting for a GoogleCloudPlatform 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.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[michelle192837]

Blocked by https://github.com/GoogleCloudPlatform/testgrid/pull/1257

/hold

Unholding once that's merged.

[michelle192837]

/ok-to-test

[google-oss-prow[bot]]

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

Test name	Commit	Details	Required	Rerun command
test-testgrid-all	8bf2e0a8c6cfea7ad85a8bcf4f61b62e8098ed8e	link	true	/test test-testgrid-all

Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository. I understand the commands that are listed [here](https://go.k8s.io/bot-commands).