Use model as body param for generateAliasAsModel

Created by: bodograumann

Fixes #3602 (closed):

When enabling generateAliasAsModel, schemes which are aliases for maps or arrays are generated as models by all templates. Those models where previously not imported and used for the relevant body parameters though.

I have not added any tests, but for my own use case the change works and the one sample where the generateAliasAsModel option is activated also shows the change in effect.

Example

Considering the following OpenAPI definition.

openapi: 3.0.2
info:
    title: Map Alias Example
    version: 0.1.0
    description: Use a data scheme which is only an alias for a map.
paths:
    '/users/{userId}/roles':
        patch:
            requestBody:
                content:
                    application/json:
                        schema:
                            $ref: '#/components/schemas/UserRoleUpdateRequest'
                required: true
            parameters:
                -
                    name: userId
                    schema:
                        type: string
                    in: path
                    required: true
            responses:
                '200':
                    description: Update successfull.
            operationId: updateUserRoles
components:
    schemas:
        UserRoleUpdateRequest:
            type: object
            additionalProperties:
                type: boolean
            example:
                admin: true
                user: false

Usually it would generate typescript-inversify code:

  public updateUserRoles(
    userId: string,
    requestBody: { [key: string]: boolean },
    observe?: "body",
    headers?: Headers
  ): Promise<any>;

Instead it should generate:

  public updateUserRoles(
    userId: string,
    userRoleUpdateRequest: UserRoleUpdateRequest,
    observe?: "body",
    headers?: Headers
  ): Promise<any>;