Logs are not explicit: they show thread IDs, not service names, and services emits logs in different formats

(Part of epic https://project.squashtest.org/browse/SQMAP-928)

Current situation

In the above log sample, the [Fatal Error] line is generated by a Java service with no source indication and no timestamp. The 2022-02-22 16:33:19.581 ERROR 55 -- ... line is generated by a Java service too, in a different format, with a timestamp but still no source indication.

Desired outcome

Logs in a similar format, with a timestamp and a source indication.