Allow syncing a subset of repositories
Allow syncing a subset of repositories

The `sync` command now takes as arguments a list of repositories name
that needs to be included in the sync job. The default is to include all
repositories defined in the configuration.

Signed-off-by: Arnaud Porterie <55258e89a8b41a46066b3a9514b15a78c1a88d17@docker.com>

icecrime/vossibility-collector,icecrime/vossibility-collector