[dataimport] Stop swallowing errors from commit/flush
Silent DB corruption is not OK.
Also drop comment from ObjectStore.commit that I don't understand.
#! /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