[Angular2] attributes are snake_cased

Description

In my generated files, the attribute in the model interfaces are all camelCased, but the fetched data is snake_cased and not changed.

export interface User {
    /**
     * The ID of the user.
     */
    userId: number;
[...]

returned object: { user_id: 12, ... }

Swagger-codegen version

the version used by http://editor.swagger.io/

Notes

However, when sending some formParams (POST) to the server, then the generated code converts the attributes:

if (challengeId !== undefined) {
    formParams.set('challenge_id', <any>challengeId);
}

Start with the Angular2 generated model interfaces and the response-handling path, then compare them with the shown formParams conversion. The fix is complete when fetched snake_case attributes are converted consistently to the camelCase model properties while the existing form parameter behavior remains correct.