add an optional name for dsl.Condition (kubeflow#3210)

[xiaohanhuang]

This change is 

[googlebot]

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[k8s-ci-robot]

Hi @xiaohanhuang. Thanks for your PR.

I'm waiting for a kubeflow 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.

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[xiaohanhuang]

Don't know why the CLA didn't work, all my information is correct now.

[googlebot]

CLAs look good, thanks!

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[xiaohanhuang]

/assign @gaoning777

[numerology]

Thanks! @xiaohanhuang do you mind adding some tests for this?

[numerology]

/ok-to-test

[numerology]

/unassign @gaoning777
/assign @numerology

[xiaohanhuang]

Thanks! @xiaohanhuang do you mind adding some tests for this?
Added tests

[numerology]

/retest

[numerology]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: numerology

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