message: Bugfix import Notification in api
diff: import {BadRequestError, Body, InternalServerError, JsonController, Post, UseBefore} from 'routing-controllers';
  import passportJwtMiddleware from '../security/passportJwtMiddleware';
  import {NotificationSettings} from '../models/NotificationSettings';
  +import {Notification} from '../models/Notification';
  import {
  NOTIFICATION_TYPE_ALL_CHANGES, NOTIFICATION_TYPE_CHANGES_WITH_RELATIONIONSHIP,
  NOTIFICATION_TYPE_NONE
  