[linting] Fix go misspell linting errors

[bvwells]

Ⅰ. Describe what this PR did

This PR is to address the go misspell linting issues raised in the Go Report Card to partially address issue #964. See https://goreportcard.com/report/github.com/alibaba/pouch

Ⅱ. Does this pull request fix one issue?

This PR partially fixes issue #964.

Ⅲ. Describe how you did it

Corrected misspell errors reported in Go Report Card.

Ⅳ. Describe how to verify it

All misspell errors should be gone from Go Report Card.

Ⅴ. Special notes for reviews

[pouchrobot]

@bvwells Thanks for your contribution. 🍻
Please sign off in each of your commits.

[CLAassistant]

All committers have signed the CLA.

[pouchrobot]

We found this is your first time to contribute to Pouch, @bvwells
👏 We really appreciate it.
Just remind that you have read the contribution guide: https://github.com/alibaba/pouch/blob/master/CONTRIBUTING.md
If you didn't, you should do that first. If done, welcome again and please enjoy hacking! 🍻

[allencloud]

Thanks a lot for your work. @bvwells
Look much better after your code change.
LGTM

[pouchrobot]

ping @bvwells

CI fails according integration system.
Please refer to the CI failure Details button to corresponding test, and update your PR to pass CI.

If this is flaky test, welcome to track this with profiling an issue.

build url: https://travis-ci.org/alibaba/pouch/builds/359424737
build duration: 1142s

[allencloud]

I am afraid that CI fails with:

FAIL: /go/src/github.com/alibaba/pouch/test/api_restart_test.go:25: APIContainerRestartSuite.TestAPIContainerRestart
/go/src/github.com/alibaba/pouch/test/api_restart_test.go:40:
    CheckRespStatus(c, resp, 204)
/go/src/github.com/alibaba/pouch/test/util_api.go:21:
    c.Assert(resp.StatusCode, check.Equals, status, check.Commentf("Error:%s", got.Message))
... obtained int = 500
... expected int = 204
... Error:container: : too many
----------------------------------------------------------------------
FAIL: /go/src/github.com/alibaba/pouch/test/api_restart_test.go:46: APIContainerRestartSuite.TestAPIRestartStoppedContainer
/go/src/github.com/alibaba/pouch/test/api_restart_test.go:49:
    CreateBusyboxContainerOk(c, cname)
/go/src/github.com/alibaba/pouch/test/util_api.go:21:
    c.Assert(resp.StatusCode, check.Equals, status, check.Commentf("Error:%s", got.Message))
... obtained int = 409
... expected int = 201
... Error:container name: TestAPIContainerRestart: already existed

This error is also seen from PR #988 's CI.

I have to say this is unrelated to the code change this PR brought.

Merging...

[bvwells]

Thanks @allencloud for the quick review and merge!