use new context to do cleanup

[fuweid]

Signed-off-by: Wei Fu fuweid89@gmail.com

Ⅰ. Describe what this PR did

use new context to do the cleanup

Ⅱ. Does this pull request fix one issue?

none

Ⅲ. Why don't you add test cases (unit test/integration test)? (你真的觉得不需要加测试吗？)

no need

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request head (me-dont-use-cancel-context@5b0d2ed). Click here to learn what that means. The diff coverage is n/a.

[zhuangqh]

please rebase to master