Fix bug for judging threshold

[windrunner123]

Describe what this PR does / why we need it

Fix a logic problem for circuit breaker

Does this pull request fix one issue?

Fix bug for judging threshold in circuit breaker.

Describe how you did it

Just change ">" to ">=".

Describe how to verify it

Run example case.

Special notes for reviews

Its simple, there is no notes.

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