This new module is specifically in charge of scheduling regularly the recurring tasks
(loader ones, either dvcs loader like: load-git, load-svn, or package loader:
pypi, npm, ..., etc...).
This new cli call will replace the manual processes started on scheduler nodes (saatchi,
scheduler0.staging).
TODO:
- [x] docker test ran by @olasd
- [ ] implement tests (@ardumont)
Related to T3667