add the needed stuff to load and prepare to use NSD files for validation

created merge request !2 (merged) to address this issue

By Dominique Marcadet on 2019-01-27T10:24:30 (imported from GitLab project)

mentioned in merge request !2 (merged)

By Dominique Marcadet on 2019-01-27T10:24:30 (imported from GitLab project)

closed via merge request !2 (merged)

By Dominique Marcadet on 2019-01-27T14:51:57 (imported from GitLab project)

mentioned in commit 86eb1da0

By Dominique Marcadet on 2019-01-27T14:51:58 (imported from GitLab project)