Fix Controller.run_as_update()

This broke when changes were made to allow processing data more recent than the last top-of-the-minute (~8 months ago). The only "updates" that worked since then were for 1-second data. It's a little bit lazy because it relies on the output_factory to return traces with proper starttimes and endtimes (that is, they fall on the tops of minutes). Probably we should be more explicit in correcting the starttimes and endtimes to line up on expected timestamps. Pushing this fix now because it has operational impacts.