[dataimport] don't commit on flush
Changeset 26cdfc6dd6f8 introduced this confusion for no apparent reason,
and it doesn't make much sense.
#! /bin/sh -e#if [ "$1" = configure ]; then if which install-docs >/dev/null 2>&1; then install-docs -i /usr/share/doc-base/cubicweb-doc fifi#DEBHELPER#exit 0