Release Python SDK 1.4.0

[alembiewski]

What this PR does / why we need it:
Includes changes for Python SDK 1.4.0 release.
Needs to be cherry-picked to the v1.4-branch

Checklist:

• Docs included if any changes are user facing

[aws-kf-ci-bot]

Hi @alembiewski. 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.

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

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[coveralls]

Pull Request Test Coverage Report for Build 1924513599

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.03%) to 36.823%

---

Files with Coverage Reduction	New Missed Lines	%
pkg/controller.v1/mpi/mpijob_controller.go	2	75.35%

Totals
Change from base Build 1884487968:	-0.03%
Covered Lines:	2272
Relevant Lines:	6170

---

💛 - Coveralls

[terrytangyuan]

Thanks!

/lgtm
/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alembiewski, terrytangyuan

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• OWNERS [terrytangyuan]

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[alembiewski]

/retest

[aws-kf-ci-bot]

@alembiewski: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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.

[johnugeorge]

/ok-to-test

[johnugeorge]

/retest