[BUG] skipFormModel property is set to true by default

Created by: DenisIstomin

Description

According to the documentation, property skipFormModel should be false by default.

To skip models defined as the form parameters in "requestBody", please use skipFormModel (default to false) (this option is introduced at v3.2.2)

But model is generated only when this property is explicitly set to false:

<globalProperties>
   <skipFormModel>false</skipFormModel>
</globalProperties>

openapi-generator version

5.0.1

            <plugin>
                <groupId>org.openapitools</groupId>
                <artifactId>openapi-generator-maven-plugin</artifactId>
                <version>5.0.1</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                        <configuration>
                            <inputSpec>${project.basedir}/src/main/resources/openapi.yaml</inputSpec>
                            <generatorName>java</generatorName>
                            <generateModelTests>false</generateModelTests>
                            <generateApis>false</generateApis>
                            <generateSupportingFiles>false</generateSupportingFiles>
                            <configOptions>
                                <dateLibrary>java8</dateLibrary>
                                <hideGenerationTimestamp>true</hideGenerationTimestamp>
                                <serializationLibrary>jackson</serializationLibrary>
                                <library>resttemplate</library>
                                <useBeanValidation>true</useBeanValidation>
                                <performBeanValidation>true</performBeanValidation>
                                <modelPackage>com.example</modelPackage>
                            </configOptions>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

OpenAPI declaration file content or url

openapi: 3.0.0
info:
  title: Title
  version: 1.0.0
paths:
  /operation:
    post:
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                task:
                  $ref: '#/components/schemas/Entity'
                fileContent:
                  type: string
                  format: binary
      responses:
        '200':
          description: 'OK'
components:
  schemas:
    Entity:
      type: object
      properties:
        Id:
          type: string