Failed downloading artefact from DevOps artifacts

### **This is autogenerated. Please review and update as needed.**

## Describe the bug

**Command Name**
`az artifacts universal download
Extension Name: azure-devops. Version: 0.16.0.`

**Errors:**
```
[WinError 2] The system cannot find the file specified
Traceback (most recent call last):
pip-install-p8t_6awn\knack\knack\cli.py, ln 206, in invoke
cli\core\commands\__init__.py, ln 603, in execute
cli\core\commands\__init__.py, ln 661, in _run_jobs_serially
cli\core\commands\__init__.py, ln 652, in _run_job
azext_devops\dev\common\exception_handler.py, ln 31, in azure_devops_exception_handler
reraise(*sys.exc_info())
Temp\pip-install-p8t_6awn\six\six.py, ln 693, in reraise
cli\core\commands\__init__.py, ln 631, in _run_job
...
Azure\CLI2\lib\subprocess.py, ln 709, in __init__
restore_signals, start_new_session)
Azure\CLI2\lib\subprocess.py, ln 997, in _execute_child
startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified
```

## To Reproduce:
Steps to reproduce the behavior. Note that argument values have been redacted, as they may contain sensitive information.

- _Put any pre-requisite steps here..._
- `az artifacts universal download --organization {} --project {} --scope {} --feed {} --name {} --version {} --path {}`

## Expected Behavior

## Environment Summary
```
Windows-10-10.0.18362-SP0
Python 3.6.6
Shell: cmd.exe

azure-cli 2.0.75 *

Extensions:
azure-devops 0.16.0

```
## Additional Context