Pass 'nova' project into ConfigOpts.
Pass 'nova' project into ConfigOpts.

Fixes bug 999305

The problem was that, post refactoring, `ConfigOpts.find_file` was no
longer searching `/etc/nova` for config files.

Change-Id: I3dee8d8f24ae3912e07dcb9d19086d55eb98ccaa

n0ano/gantt,n0ano/gantt