Document TaskActionResource

So for a resource to be appeared in OpenMRS Swagger Documentation, following methods should be overridden, based on its supported CRUD operations.

• Model getGETModel(Representation)
  • If supports GET operations - override this method.
• Model getCREATEModel(Representation)
  • If supports CREATE operations - override this method.
• Model getUPDATEModel(Representation)
  • If supports UPDATE operations - override this method.

As stated by the comment, you only need to override `getCREATEModel(Representation)` method for TaskActionResource.