Logs result at debug level

def _log(file_list, list_name, in_path):
    """Logs result at debug level"""
    file_names = '\n'.join(file_list)
    LOG.debug("\nDiscovered %(size)d %(name)s file(s) in %(path)s:\n"
              "%(files)s\n",
              {'size': len(file_list), 'name': list_name, 'path': in_path,
               'files': file_names})