Exceptions should show all details

[lmazuel]

Example of JSON:

error": {
            "code": "ValidationError",
            "message": "One or more fields contain incorrect values: ",
            "details": [
                {
                    "code": "ValidationError",
                    "target": "representation",
                    "message": "Parsing error(s): String '' does not match regex pattern '^[^{}/ :]+(?: :\\\\d+)?$'. Path 'host', line 1, position 297."
                },
                {
                    "code": "ValidationError",
                    "target": "representation",
                    "message": "Parsing error(s): The input OpenAPI file is not valid for the OpenAPI specificate https: //github.com/OAI/OpenAPI-Specification/blob/master/versions/2.0.md (schema https://github.com/OAI/OpenAPI-Specification/blob/master/schemas/v2.0/schema.json)."
                }
            ]
        }

Right now, just the initial lines are shown. We should see all in a multiline line log

[xiangyan99]

Fixed