don't delete lock file when lock is held by other

[schneiderlin]

What is the purpose of the change

when two servers started on the same machine. the first one can acquire the lock, and the second one failed.
but when the second server shutdown, the lock file held by the first server will be deleted.

Brief changelog

change to only delete lock when successfully acquiring file lock

Verifying this change

Checklist

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
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100.0% Coverage
0.0% Duplication