Set a Running condition when the XGBoostJob is completed and doesn't have a Running condition

[tenzen-y]

What this PR does / why we need it:
I fixed the reconciling error in XGBoost Job.
When XGBoostJob is completed (succeeded or failed) before the controller sets a Running condition, XGBoostJob finishes without a Running condition.

So, I modified the controller so that the controller can set a Running condition when the XGboostJob is completed and doesn't have a Running condition.

Which issue(s) this PR fixes (optional, in Fixes #<issue number>, #<issue number>, ... format, will close the issue(s) when PR gets merged):
Part-of #1779

Checklist:

• Docs included if any changes are user facing

[coveralls]

Pull Request Test Coverage Report for Build 4546766224

• 12 of 22 (54.55%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.07%) to 39.611%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/controller.v1/xgboost/status.go	12	15	80.0%
pkg/controller.v1/xgboost/xgboostjob_controller.go	0	7	0.0%

Totals
Change from base Build 4529361961:	0.07%
Covered Lines:	2751
Relevant Lines:	6945

---

💛 - Coveralls

[tenzen-y]

@terrytangyuan I addressed your comment. PTAL.

[terrytangyuan]

/lgtm

[tenzen-y]

/assign @johnugeorge @nagar-ajay

[google-oss-prow]

@tenzen-y: GitHub didn't allow me to assign the following users: nagar-ajay.

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In response to this:

/assign @johnugeorge @nagar-ajay

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[johnugeorge]

Somehow, I missed this PR

Sorry for the delay @tenzen-y

/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: johnugeorge, tenzen-y

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