Fuelmenu cleanup for settings and interfaces

Excludes docker* and veth* interfaces from
being configurable. Naily facts are removed
from fuelmenu completely.
Update astute.yaml path to /etc/fuel

Change-Id: Ib854c4fd17d1c62ca92f565553a6ee8ead2dd765
Closes-Bug: #1323369
Closes-Bug: #1327009
(cherry picked from commit 178ec641d88fe14b78e5903af0175d194954dbe8)