[dataimport] make MetaDataGenerator / NoHookObjectStore usable from a datafeed parser ie make it possible to create entities with external source as cw_source and proper external id. Closes #4891552

etc/init.d
etc/cubicweb.d
etc/bash_completion.d
usr/bin
usr/share/doc/cubicweb-ctl
var/log/cubicweb
var/lib/cubicweb/backup
var/lib/cubicweb/instances