The re-implementation here is based on make 2 points:
- Replace expandSchema to use ref-parser library
- Replace tv4 by cfworker json schema (validator)
The selection of the validator to replace tv4, consider 2 criteria:
- Don't use eval or anything that requires changes on CSP (like unsafe-eval)
- Has the least amount of errors as possible (more important then speed)
- Is ranked on well known on benchmark tests
See: https://github.com/ebdrup/json-schema-benchmark
This refactoring includes a large set of tests and fixes for parameter field (ie: required)
This MR replaces and extends https://lab.nexedi.com/nexedi/slapos.core/merge_requests/440