domain mail add twice when edit the RENATER partage parameters

Description

In Renater Partage plugin associated to sympa plugin , When a entry is edited I gopt an ERROR 500 when FD trying to make modification trough the web service

Distribution Name and Version

on debian stretch

FusionDirectory Version

ii  fusiondirectory-plugin-renater-partage        1.2-2~jenkinsbuild799                        all          Renater partage integration plugin for FusionDirectory
ii  fusiondirectory-plugin-renater-partage-schema 1.2-2~jenkinsbuild799                        all          LDAP schema for FusionDirectory renater partage plugin

Plugin with the defect

plugin-renater-partage

PHP version used

Origin of php packages

apt-cache policy php
php:
  Installé : 1:7.0+49
  Candidat : 1:7.0+49
 Table de version :
 *** 1:7.0+49 500
        500 http://ftp.fr.debian.org/debian stretch/main amd64 Packages
        100 /var/lib/dpkg/status

Steps to Reproduce

I Try to add Partage information applied to a list

Expected behavior:

PD should create or modified a group on Partage side

Actual behavior: Error when trying top make some modification due to a incorrect partage account , FD add Partage domain name even if "cn" field contain a domain name

It's a side effect of #5804 (closed)