log_opt_values() doesn't show sys.argv if no args passed to CONF()

[Mark McLoughlin]

If you do CONF(), then args should default to sys.argv[1:]

However, we rely on ArgumentParser.parse_args() behaviour here so ConfigOpts._args never gets set to sys.argv[1:] and log_opt_values() doesn't show the args:

 def log_opt_values(self, logger, lvl):
     ...
     logger.log(lvl, "command line args: %s", self._args)

[Davanum Srinivas (DIMS) (dims-v)]

Looks like this is already fixed - https://github.com/openstack/oslo-config/commit/ad2e416b9dcc4ceb4a12da215c44ef4194a46d79