In #2698 we decided to put legacy helper functions in `core/legacy`. I think that’s a fine idea, though if we’re going to have a bunch of badge helper functions in there, it seems like it is probably better to keep these two important but esoteric helper functions with the core code to which they are most coupled. So I added `legacy-` to the name, and put them in `core/base-service`.
This test is being weirdly flaky in #2809. The problem seems to be in the test helper code, so I rewrote this using Joi.
I imagine the change has to do with a change to the test ordering. It's a bit puzzling.
However, the new test seems fine (and the endpoint is rarely used; not critical to begin with).
