add uuid to id for leader election

[fisherxu]

No description provided.

[k8s-ci-robot]

Hi @fisherxu. Thanks for your PR.

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[fisherxu]

/assign @gaocegege

[coveralls]

Coverage remained the same at 85.217% when pulling f347839 on fisherxu:master into 74bef97 on kubeflow:master.

[gaocegege]

/lgtm
/approve

Thanks for your contribution! 🎉 👍

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gaocegege

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