Use swh-model objects instead of dicts.
Test Plan
tests will fail because swh-loader-core!69 (closed) is needed
Migrated from D2731 (view on Phabricator)
Staging instance, all changes can be removed at any time
tests will fail because swh-loader-core!69 (closed) is needed
Migrated from D2731 (view on Phabricator)