Reimplement banner creation to let the user decide if he wants a
        banner or not

def _banner_default(self):
        """
        Reimplement banner creation to let the user decide if he wants a
        banner or not
        """
        # Don't change banner for external kernels
        if self.external_kernel:
            return ''
        show_banner_o = self.additional_options['show_banner']
        if show_banner_o:
            return self.long_banner()
        else:
            return self.short_banner()