[aspnetcore] Required Error in params templates

Description

In modules/swagger-codegen/src/main/resources/aspnetcore/:
The formParam.mustache, headerParam.mustache and queryParam.mustache templates have an error in the Required sentence that generate wrong params in the controller file. It would be [Required] and not [Required()]. The brackets are left over.

The pathParam.mustache template is correct.

Swagger-codegen version

Latest master

Swagger declaration file content or url

modules/swagger-codegen/src/main/resources/aspnetcore/formParam.mustache
modules/swagger-codegen/src/main/resources/aspnetcore/headerParam.mustache
modules/swagger-codegen/src/main/resources/aspnetcore/queryParam.mustache

Steps to reproduce

Genereate an aspnetcore project with:

paths:
  /customers:
    get: 
      operationId: getCustomerById
      parameters:
        - in: query
          name: idCustomer
          description: customer id
          required: true
          schema:
            type: string
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CustomerCard'    

Suggest a fix/enhancement

Remove the brackets of [Required()] in:
modules/swagger-codegen/src/main/resources/aspnetcore/formParam.mustache
modules/swagger-codegen/src/main/resources/aspnetcore/headerParam.mustache
modules/swagger-codegen/src/main/resources/aspnetcore/queryParam.mustache

Start with modules/swagger-codegen/src/main/resources/aspnetcore/formParam.mustache, headerParam.mustache, and queryParam.mustache, comparing them with pathParam.mustache. Generate an aspnetcore project from the supplied OpenAPI example. Done means the generated controller uses the expected Required annotation for the affected parameter templates.