Align config filename with production and update npm loading task name
core.lister_base: Align config filename with production (see https://forge.softwareheritage.org/source/puppet-swh-site/browse/production/data/defaults.yaml$2054-2103)
npm.lister: Update loading task name Related swh-scheduler#1508 (closed)
Migrated from D1401 (view on Phabricator)