python-ironicclient does not show error messages

[Yuriy Zveryanskyy]

Example:

yura@dev-0:~$ ironic node-create
'unicode' object has no attribute 'get'

Our API service works correct:
yura@dev-0:~$ curl -i -X POST http://192.168.122.107:6385/v1/nodes -H "Content-Type: application/json" -H "Accept: application/json" -d '{}'
HTTP/1.0 400 Bad Request
Date: Wed, 29 Oct 2014 10:19:57 GMT
Server: WSGIServer/0.1 Python/2.7.6
Content-Type: application/json
Content-Length: 173

{"error_message": "{\"debuginfo\": null, \"faultcode\": \"Client\", \"faultstring\": \"Invalid input for field/attribute driver. Value: 'None'. Mandatory field missing.\"}"}