lightning: fix test lightning_reload_cert

[sleepymole]

What problem does this PR solve?

Issue Number: close #42807

Problem Summary:

What is changed and how it works?

Same to #39697.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• D3Hunter
• lichunzhu

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[sleepymole]

/run-integration-br-test

[sleepymole]

/test unit-test

[sleepymole]

All lightning tests are passed.

https://ci.pingcap.net/blue/organizations/jenkins/br_ghpr_unit_and_integration_test/detail/br_ghpr_unit_and_integration_test/15778/pipeline/

[sleepymole]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 606a335

[ti-chi-bot]

@gozssky: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci-tidb/unit-test	606a335	link	true	/test unit-test

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