Incomplete type when response body is a ref to a map

Created by: etherealjoy

Description

When the response is a map incomplete type is created for the response body

[main] ERROR o.o.codegen.DefaultCodegen - No Type defined for Additional Property class Schema

go

func (a *DefaultApiService) ApiTestConfigurationGet(ctx context.Context) (ModelMap, 
*http.Response, error)

cpp-qt5

void apiTestConfigurationGetSignal(QMap* summary);

openapi-generator version

master 3.1.x

OpenAPI declaration file content or url

---
# This is a sample Swagger spec
swagger: "2.0"
info:
  description: Application Description
  version: 1.0.0
  title: Application
host: 0.0.0.0:8080
basePath: /api/v1.0
schemes:
- http
paths:            
  /default/ApiTestSetup: 
    get:
      operationId: apiTestConfigurationGet
      produces:
      - application/json
      consumes:
      - application/json
      parameters : 
      - name : "body"
        in : "body"
        required: true
        schema: 
          $ref: "#/definitions/TestEndPointConfigResponse"      
      responses:
        200:
          description: "Successful response"
          schema: 
            $ref: "#/definitions/TestEndPointConfigResponse"          
        400:
          description: "The request was not successfully executed."           
definitions:
  TestEndPointConfig:
    type: "object"
    properties:
      Config:
        type: "object"
        additionalProperties:
          type: "string"

  TestEndPointConfigResponse:
    type: object
    additionalProperties:
      $ref: "#/definitions/TestEndPointConfig" 

Command line used for generation

java -jar <pathToJar> generate -i ./swagger.yaml  -o ./gengocl -g go
java -jar <pathToJar> generate -i ./swagger.yaml  -o ./gencpp -g cpp-qt5

Related issues/PRs

#362