tests: make TestArchiver inherit from CeleryTestFixture
so these tests do not need a running rabbitmq to pass.
Test Plan
run tox with rabbitmq off or check jenkins
Migrated from D589 (view on Phabricator)
so these tests do not need a running rabbitmq to pass.
run tox with rabbitmq off or check jenkins
Migrated from D589 (view on Phabricator)