Set timeout and interval to all Eventually tests

[tenzen-y]

What this PR does / why we need it:
I modified all Eventually tests to fix flaky tests:

1. Commonize timeout and interval.
2. Set timeout and interval to all Eventually tests

Which issue(s) this PR fixes (optional, in Fixes #<issue number>, #<issue number>, ... format, will close the issue(s) when PR gets merged):
Fixes #1820
Fixes: #1822
Fixes: #1844
Related to #1816

Checklist:

• Docs included if any changes are user facing

[coveralls]

Pull Request Test Coverage Report for Build 5448573469

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 4 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.04%) to 33.665%

---

Files with Coverage Reduction	New Missed Lines	%
pkg/controller.v1/mpi/mpijob_controller.go	4	79.22%

Totals
Change from base Build 5448290334:	-0.04%
Covered Lines:	3281
Relevant Lines:	9746

---

💛 - Coveralls

[tenzen-y]

/assign @terrytangyuan @johnugeorge

[terrytangyuan]

Thanks!

/lgtm

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [terrytangyuan]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment