upstart conf to check RUN=yes only on auto start.

#436 discusses the problem about manual start command line and auto start control. I achieved to change upstart confs which do not need RUN=yes for command line and keeps the compatibility with /etc/default files.

The change applies upstart confs to be:

- For manual start, just type ``initctl start vdc-xxxx``. any following variables are ignored.
- For auto start, RUN=yes in ``/etc/default/vdc-xxxx`` is available same as before.