(ci: fix master build) journal.tests: Adapt model according to latest change
origin model no longer allows to have type.
Related to f533f62bbf114cfcc29f7c72307c4dfbe99cf048
This will fix the current broken master build [1]
Similar to swh-storage!365 (closed) Related to swh-model!90 (closed)
Test Plan
tox
Migrated from D2898 (view on Phabricator)