[dataimport] introduce usage of MetadataGenerator into the massive store
This allows more flexibility and code sharing w/ nohook store.
Closes #10338621
#! /bin/sh -ecase "$1" in remove) if [ -x "/etc/init.d/cubicweb-ctl" ]; then invoke-rc.d cubicweb-ctl stop || true fi ;;esac#DEBHELPER#exit 0