Option to disable validation in the API clients

Description

Currently, there's no way to disable validation in the API clients and therefore we cannot use the API clients to perform integration tests with the RESTful backend (e.g. the API client cannot send requests with incorrect values as the client validation rule will fail the operation)

We'll introduce an option (e.g. client_side_validation in the configuration object)

Swagger-codegen version

Latest master

Swagger declaration file content or url

Related issues

https://github.com/swagger-api/swagger-codegen/pull/5528 has been submitted for Ruby API client.

Suggest a Fix

If anyone wants to work on the enhancement, please reply to let us know.