Reduce security risk on remote_census_api

[taitus]

References

Related PR: #3498
Related Documentation PR: Update remote census doc #86

Objectives

The use of eval is a serious security risk, so we change by JSON.parse method.
Describe expected format for Setting["remote_census.request.structure"]

Visual Changes

Notes

⚠️ If your installation is using the "Remote Census configuration" feature and you have already configured the "Request Structure" field, please be sure to update the format of this field.
You can find this section on: Settings > Global Settings > Remote Census configuration

Example for old expected format value:

{
  request: {
    codigo_institucion: 12,
    codigo_portal: 5,
    documento:   ,
    tipo_documento:  ,
  }
}

Example for new expected format value:

{
  "request": {
    "codigo_institucion": 12,
    "codigo_portal":  5,
    "documento":  null,
    "tipo_documento":  null,
  }
}

[javierm]

Since now we aren't using eval anymore 🎉, would it be possible to move the Security/Eval rubocop rule from .rubocop.yml to .rubocop_basic.yml (where rules are in alphabetic order, by the way)? That way our dear Hound will report about it 😄.

[javierm]

Awesome! 🎉