Collect all nova/cinder configuration files

Instead of selecting just specific nova/cinder configuration
files just include all the configuration files instead.

This helps avoid the problem where other newer config
files are needed or old ones disappear (nova.conf.sample
no longer exists).

Change-Id: If3c37ef4b33d5f725a1798881cb55f4513e0f560
Merge "Collect all nova/cinder configuration files"