[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);
}