Don't re-import model strategies.
Import them directly from swh-model instead of re-importing them from swh-storage's tests.
Migrated from D1389 (view on Phabricator)
Staging instance, all changes can be removed at any time
Import them directly from swh-model instead of re-importing them from swh-storage's tests.
Migrated from D1389 (view on Phabricator)