Job functions preset: should get a job failed

[flaky-bot]

This test failed!

To configure my behavior, see the Flaky Bot documentation.

If I'm commenting on this issue too often, add the flakybot: quiet label and
I will stop commenting.

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commit: 8f21081
buildURL: Build Status, Sponge
status: failed

Test output

Command failed: node createJobFromPreset.js long-door-651 us-central1 gs://nodejs-samples-transcoder-test-f1d43c1e/ChromeCast.mp4 gs://nodejs-samples-transcoder-test-f1d43c1e/test-output-preset/ preset/web-hd
14 UNAVAILABLE: Authentication backend unavailable.
Error: Command failed: node createJobFromPreset.js long-door-651 us-central1 gs://nodejs-samples-transcoder-test-f1d43c1e/ChromeCast.mp4 gs://nodejs-samples-transcoder-test-f1d43c1e/test-output-preset/ preset/web-hd

14 UNAVAILABLE: Authentication backend unavailable.
at checkExecSyncError (child_process.js:635:11)
at execSync (child_process.js:671:15)
at createJobFromPreset (test/transcoder.test.js:201:20)
at Context.<anonymous> (test/transcoder.test.js:220:5)
at processImmediate (internal/timers.js:461:21)</pre></details>

[flaky-bot]

Looks like this issue is flaky. 😟

I'm going to leave this open and stop commenting.

A human should fix and close this.

---

When run at the same commit (8f21081), this test passed in one build (Build Status, Sponge) and failed in another build (Build Status, Sponge).

[alexander-fenster]

All tests passed in #205, closing it for now, let's see if it comes back.