Output of "nova --debug network-list" is not matching with the doc.

Output of "nova --debug network-list" is not matching with the doc.
The extra parameters observed are:
- rxtx_base
- priority
- dns2

Fix bug 1158645

Change-Id: Id9bb7eb762b1edfbae0d6e79451446381a5dc91e
Merge "Output of "nova --debug network-list" is not matching with the doc."