Return boolean based on 'alternativePercentage' and 'size' returned from backup_progress (cloud only).

def backup_complete(self):
        """Return boolean based on 'alternativePercentage' and 'size' returned from backup_progress (cloud only)."""
        if self.deploymentType != 'Cloud':
            logging.warning(
                'This functionality is not available in Server version')
            return None
        status = self.backup_progress()
        perc_complete = int(re.search(r"\s([0-9]*)\s",
                                      status['alternativePercentage']).group(1))
        file_size = int(status['size'])
        return perc_complete >= 100 and file_size > 0