- Fix some golint errors for `pkg/kubectl`
- Fix a golint error for `pkg/kubectl/apps`
- Fix all golint errors for `pkg/kubectl/cmd`
- Fix some golint errors for `pkg/kubectl/generate/versioned`
- Fix a golint error for `pkg/kubectl/generate`
- Fix some golint errors for `pkg/kubectl/metricsutil`
- Fix all golint errors for `pkg/kubectl/util`
- Fix all golint errors for `pkg/kubectl/util/slice`
Automatic merge from submit-queue (batch tested with PRs 62025, 63851, 64077, 63967, 63991). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
check error when parse field failed
**What this PR does / why we need it**:
check error when parse field failed
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
