install supervisor program config file

def install_program(self):
        """
        install supervisor program config file
        """
        text = templ_program.render(**self.options)
        config = Configuration(self.buildout, self.program + '.conf', {
            'deployment': self.deployment_name,
            'directory': os.path.join(self.options['etc-directory'], 'conf.d'),
            'text': text})
        return [config.install()]