Adds logs to debug in staging
Merge branch 'develop' of github.com:CartoDB/cartodb20 into develop

* 'develop' of github.com:CartoDB/cartodb20:
  [importer] Remove Candidate
  [importer] Adapt acceptace specs to latest changes
  [importer] Refactor runner to use a job and a downloader as collaborators
  [importer] Refactor job to not store file details
  [importer] Loader now takes a Job and a SourceFile
  [importer] Refactor params order in Ogr2ogr
  [importer] Refactor Downloader to use SourceFile
  [importer] Implement SourceFile
  Cosmetic changes in Table::Relator