Rerun unsuccessful celery tasks indefinitely

Change celery tasks config to rerun tasks indefinitely should they fail for an expected reason, like a lock error or because of the tasks return value (conditional gate).

joeflow/runner/celery.py

@@ -16,6 +16,7 @@
 @shared_task(
     bind=True,
     ignore_results=True,
+    max_retries=None,
     autoretry_for=(OperationalError,),
     retry_backoff=True,
 )