Code review comment for lp:~cjwatson/launchpad/refactor-cron-germinate

Right. I've tracked down all the problems I could find and released germinate 2.1 to fix all of them; none of them were problems with this branch. The runtime is now down to about 4m50s on mawson; the only differences in output are (a) in places where it doesn't matter very much and (b) accountable to a pure-virtual dependency in libenchant1c2a, where germinate is entirely entitled to choose a provider at random, so I'm not worried about those.