[BUG] Python Authentication path expecting auth token in oauth2 models

Created by: developersteve

Bug Report Checklist

[ ✅ ] Have you provided a full/minimal spec to reproduce the issue?
[ ✅ ] Have you validated the input using an OpenAPI validator (example)?
[ ✅ ] What's the version of OpenAPI Generator used? 3.3.4
[ ✅ ] Have you search for related issues/PRs?
[ ✅ ] What's the actual output vs expected output? Able to generate a token without needing a token

Description

Generated SDK seems to be requesting a token for a token generating call, only seems to be an issue with python

Example generated SDK

api_instance = API.AuthenticationApi(API.ApiClient(configuration))

openapi-generator version

3.3.4

OpenAPI declaration file content or url

Swagger 2.0 spec

securityDefinitions:
  OAuth2:
    type: oauth2
    flow: application
    tokenUrl: 'example.com'
    scopes:
      LOT_DEVICES_READ: LOT_DEVICES_READ
paths:
  /oauth/token:
      summary: Generate OAuth2 token
      tags:
        - Authentication
      operationId: auth token
      produces:
        - application/json
      consumes:
        - application/x-www-form-urlencoded
      parameters:
        - name: client_id
          in: formData
          required: true
          type: string
          description: ''
        - name: client_secret
          in: formData
          required: true
          type: string
          description: ''
        - name: grant_type
          in: formData
          required: true
          type: string
          default: client_credentials

Steps to reproduce

Generate SDK with the above