thank you for your answer,

neutron_config {
'DEFAULT/external_dns_driver':
 value => 'designate';
'designate/url':
value => "http://${hiera('control_node')}:9001/v2";
'designate/admin_auth_url':
value => "http://${hiera('control_node')}:35357/v2.0";
'designate/admin_password':
value => hiera('neutron::keystone::auth::password');
'designate/admin_username':
value => 'neutron';
'designate/admin_tenant_name':
value => 'services';
'designate/allow_reverse_dns_lookup':
value => true;
'designate/ipv4_ptr_zone_prefix_size':
value => '24';
'designate/ipv6_ptr_zone_prefix_size':
value => '64';
}

It's not nice but an working workaround for neutron