[dataimport] make it possible to insert 'empty' (i.e. no-attrs) entities
In such cases (e.g. ternary relations), generated RQL must be
'INSERT MyEntityType' instead of 'INSERT MyEntityType:'
#! /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