Unhelpful error when trying to add a duplicate ISP
When adding a new ISP through a JSON URL, if the ISP already exists in the system, the error message is not at all helpful:
* Validating the JSON against the schema
/!\ Error with the validation API, connection was closed. Retry in a few seconds
The check for duplicate seems to come from WebValidator
in crawler.py
, but the error message is not propagated back to the user.