The parsoid-lb endpoint is going away; RESTBase needs to have some other way of running tests.
We should switch to http://parsoid-beta.wmflabs.org/ instead.
Here's a PR that switches all RESTBase tests to a labs parsoid: https://github.com/wikimedia/restbase/pull/378
The only thing left to decide, is which host to use in config.example.wikimedia.yaml for local manual testing.
Merged && "deployed" :)