WIP Deposit Workflows integration

This code is already present in `eng.get_current_taskname()`. I propose a following solution:

```python
# after "raise Exception('Unknown start pointfor task: %s' % obj)"

sender = {
	"workflow": self.uuid,
	"task": self.get_current_taskname(),
	"object": obj
}
workflow_restarted.send(sender)

```