Code review comment for lp:~jpds/launchpad/mirrorprober-next-probe-schema

Looks good, since it's consistent with checkwatches and the branch puller:

< BjornT> jpds: did you discuss the implementation with anyone? i'm not.
          sure exactly what you're planning to do.
< jpds> BjornT: Change the distribution mirror to be more like the branch.
        puller so that we can have manual probes.
< BjornT> jpds: can you point me to the relevant part of the branch.
          puller?
< jpds> BjornT: next_mirror for branches, and next_check for bug watches.