@JsonUnwrappred is ignored by Schema generation

This issue is a copy of https://github.com/springfox/springfox/issues/192

@JsonUnwrappred jackson annotation is ignored by schema generation.

springfox version 2.6.1

@RequestMapping(value = "1740", method = RequestMethod.GET)
public Bug1740 bugNNN() {
  return new Bug1740();
}

public class Bug1740 {
  private String value;

  @JsonUnwrapped
  private Bug1740Inner inner;

  public String getValue() {
    return value;
  }

  public Bug1740Inner getInner() {
    return inner;
  }

  private final class Bug1740Inner {
    private String innerValue;

    public String getInnerValue() {
      return innerValue;
    }
  }
}

Actual schema generated:

"Bug1740": {
  "type": "object",
  "properties": {
    "inner": {
      "$ref": "#/definitions/Bug1740Inner"
    },
    "value": {
      "type": "string"
    }
  }
},
"Bug1740Inner": {
  "type": "object",
  "properties": {
    "innerValue": {
      "type": "string"
    }
  }
}

Expected schema:

"Bug1740": {
  "type": "object",
  "properties": {
    "value": {
      "type": "string"
    },
    "innerValue": {
      "type": "string"
    }
  }
}

PR with test https://github.com/springfox/springfox/pull/1741