Merge pull request #49860 from zhangxiaoyu-zidif/fix-error-print-for-cronjob-utils-test
Automatic merge from submit-queue (batch tested with PRs 47416, 47408, 49697, 49860, 50162)
fix error message for cronjob
**What this PR does / why we need it**:
fix error message for cronjob
expected an error would be better than unexpected lack of error.
ref: https://github.com/kubernetes/kubernetes/blob/master/cmd/genutils/genutils_test.go#L33
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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