Automated cherry pick of #2079: fix volcano podgroup update issue

[tenzen-y]

Cherry pick of #2079 on v1.8-branch.
#2079: fix volcano podgroup update issue
For details on the cherry pick process, see the cherry pick requests page.

[google-oss-prow]

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[tenzen-y]

/close

[google-oss-prow]

@tenzen-y: Closed this PR.

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/close

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[tenzen-y]

/reopen

[google-oss-prow]

@tenzen-y: Reopened this PR.

In response to this:

/reopen

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[coveralls]

Pull Request Test Coverage Report for Build 9419664408

Details

• 0 of 3 (0.0%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.02%) to 35.366%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/controller.v1/common/job.go	0	3	0.0%

Files with Coverage Reduction	New Missed Lines	%
pkg/controller.v1/mpi/mpijob.go	1	91.06%

Totals
Change from base Build 8869266420:	-0.02%
Covered Lines:	4373
Relevant Lines:	12365

---

💛 - Coveralls