AI platform create custom job: "after all" hook: should cancel the customJob and delete it for "should create a new custom job" failed

[flaky-bot]

Note: #257 was also for this test, but it was closed more than 10 days ago. So, I didn't mark it flaky.

---

commit: 84baed1
buildURL: Build Status, Sponge
status: failed

Test output

Command failed: node ./delete-custom-job.js 8402052793824706560 ucaip-sample-tests                                      us-central1
9 FAILED_PRECONDITION: The CustomJob "projects/ucaip-sample-tests/locations/us-central1/customJobs/8402052793824706560" is in state "QUEUED", and cannot be deleted. Please cancel it or wait for its completion before trying deleting it again.
Error: Command failed: node ./delete-custom-job.js 8402052793824706560 ucaip-sample-tests                                      us-central1

9 FAILED_PRECONDITION: The CustomJob "projects/ucaip-sample-tests/locations/us-central1/customJobs/8402052793824706560" is in state "QUEUED", and cannot be deleted. Please cancel it or wait for its completion before trying deleting it again.
at checkExecSyncError (child_process.js:635:11)
at Object.execSync (child_process.js:671:15)
at execSync (test/create-custom-job.test.js:24:28)
at Context.<anonymous> (test/create-custom-job.test.js:68:5)
at processImmediate (internal/timers.js:461:21)</pre></details>