Fixes bug 970406 - pull ADI/blocklist pings from Hive with crontabber

This job fetches ADI aggregates daily from Hive using a SQL query. Many thanks to @peterbe and @lars for help with the mocking, which proved to be daunting.
Is this necessary? It seems odd. If it is necessary, because it is so odd I'd expect to see a bit more verbose comment around it.