the status of signalrun is not correctly save when failed

### Description

When a signalrun is failed, the status of the signalrun will be not correctly saved.

See the error message below:
```bash
AttributeError: 'Signalrun' object has no attribute 'STATUS_ERROR'
```

### Solution

Update 
```py
status = self.STATUS_ERROR
```
to
```py
status = self.STATUS_ERRORED
```