Script to purge artifact_file

Run it with /usr/share/codendi/src/utils/php-launcher.sh /usr/share/codendi/tools/utils/dump_trackerv3_attachments.php

Change-Id: I7da37748754830331cad18f63544df514a699806
Merge commit 'refs/changes/03/903/1' of http://gerrit.tuleap.net/tuleap into HEAD

* http://gerrit.tuleap.net/tuleap:
  Script to purge artifact_file
This is Tuleap 6.4.99.11