Merge remote branch 'drkranz/make-changelog' into merge

* drkranz/make-changelog:
  Don't hardcode paths
  Check brit_file value, it can be None
  s/britney_changelog/changelog/
  Restore Changelogs config entry for compatibility purposes
  Update projectb with changelogs config values
  Define Britney changelog file from suite table
  make-changelog: drop useless -T command
  Define changelogs export path into projectb

Signed-off-by: Joerg Jaspert <joerg@debian.org>