[ISSUE 657] Fix HTTP_HandleCancel in TestAgent_HandleHTTP was a flakey test

[Kiyo510]

Fixes: #657

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 66.16%. Comparing base (a10fff5) to head (f69c9ff).

Additional details and impacted files

[](https://app.codecov.io/gh/daguflow/dagu/pull/658?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=daguflow) ```diff @@ Coverage Diff @@ ## main #658 +/- ## ======================================= Coverage 66.16% 66.16% ======================================= Files 53 53 Lines 4156 4156 ======================================= Hits 2750 2750 Misses 1186 1186 Partials 220 220 ``` ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/daguflow/dagu/pull/658?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=daguflow). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=daguflow) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/daguflow/dagu/pull/658?dropdown=coverage&src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=daguflow). Last update [a10fff5...f69c9ff](https://app.codecov.io/gh/daguflow/dagu/pull/658?dropdown=coverage&src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=daguflow). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=daguflow).