Allow multiple command/message in one handler

[Folleach]

For avoid boilerplate

handlers:
- delay: 0
  properties:
    type: daintegrate/handler/message
    value:
      message: Hello! This is an example message for all events from Donation Alerts
- delay: 0
  properties:
    type: daintegrate/handler/message
    value:
      message: Hello! This is an example message for all events from Donation Alerts