Improve the cli a bit and normalize the lister_db_url config

• Make the --lister option of the cli tool a variadic argument and add a 'all' possibel value for it, so that one can initialize all the database for all listers at once.

• Add an entry point for the cli command

• Change the lister_db_url config option into a 'lister' one

  with conventional structure { 'cls': cls, 'args': {}}

Bump dependencies

Migrated from D1083 (view on Phabricator)