Changes

debian: do not install osmo-ctrl2cgi.service

This service is calling scripts/ctrl2cgi.py, which has been deprecated
and is no longer part of the package (there's no /usr/bin/ctrl2cgi.py).

Change-Id: I6250f92d12774c69a8647b8cd26d0aa715646724
Fixes: 36cfd17 ("setup.py: do not install scripts/{soap,ctrl2cgi}.py")