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

---

commit: e1c5cd6
buildURL: Build Status, Sponge
status: failed

Test output

Command failed: node ./cancel-custom-job.js undefined ucaip-sample-tests                                      us-central1
16 UNAUTHENTICATED: Request had invalid authentication credentials. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.
Error: Command failed: node ./cancel-custom-job.js undefined ucaip-sample-tests                                      us-central1

16 UNAUTHENTICATED: Request had invalid authentication credentials. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.
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:62:5)
at processImmediate (internal/timers.js:461:21)</pre></details>