Allow to override celery config file name via the SWH_CONFIG_FILENAME env var

this will take precedence over the implicit config file scheme. The expected config file given via the environment variable is expected to have a [celery] section which will be used as config for the Celery app created in swh.scheduler.celery_backend.config.

Related to swh-core#1410 and swh-core#826 (closed).

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Migrated from D1067 (view on Phabricator)

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mentioned in merge request swh-core!41 (closed)

Merge request was accepted

approved this merge request

Some references in the commit message have been migrated:

• T1410 is now swh-core#1410
• T826 is now swh-core#826 (closed)

rebased ans small fix

Merge request was merged

closed

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