fix #544758 by calling custom sql scripts in add_cubes. Refactor to benefit from code of db initialization on the migration handler.

#! /bin/sh -e

if [ -x "/etc/init.d/cubicweb-ctl" ]; then
    invoke-rc.d cubicweb-ctl restart || true
fi
 
 
#DEBHELPER#
 
exit 0