nlu_dn_attribut permit to choose DN attribute

tasks/ldap_user_inc.yml

@@ -21,7 +21,6 @@
         sn: "{{ lastname | default( firstname ) }}"
         cn: "{{ firstname }}"
         mail: "{{ email }}"
-        uid: "{{ firstname | lower }}"
         PreferredDeliveryMethod: any
         displayName: "{{ firstname }} {{ lastname }}"
         userPassword: "{{ password }}"