Broadcast completed/failed tasks #10
Description
Once the task is complete, it is often required to update some properties in the database (e.g. set the docker_id of the entity) or send notifications somewhere.
Need to create a pair of events for each separate task type: ***CompletedEvent and ***FailedEvent.
As we already have the CreateNetworkTask(result) and InitSwarmTask(result), we'll get four events:
- CreateNetworkCompletedEvent
- CreateNetworkFailedEvent
- InitSwarmCompletedEvent
- InitSwarmFailedEvent