docs: def _update_keystone_paste_ini(self):
          """remove admin_token_auth from the [pipeline:public_api],
          [pipeline:admin_api], and [pipeline:api_v3] sections"""
          with open('tmp_keystone_paste_ini_' + env.host_string, 'w') as f:
              f.write(conf_keystone_paste_ini)
          files.upload_template(filename='tmp_keystone_paste_ini_' + env.host_string,
                                destination='/etc/keystone/keystone-paste.ini',
                                use_sudo=True,
                                backup=True)
          os.remove('tmp_keystone_paste_ini_' + env.host_string)