supannRefId field is missing for "etablissement"

Requirements

Add the supannRefId field in FD when adding or modifying an "etablissement" It is allowed by LDAP schema (field member of supannEntite)

Actual behavior

No supannRefId is shown

Expected behavior

Supann RefId should be available in this interface

dirty fix :

root@mc-pas-test:/usr/share/fusiondirectory/plugins/admin/supannStructures# diff class_etablissement.inc class_etablissement.inc.init 
117,125d116
< 	  new SetAttribute(
<             new StringAttribute(
<               _('Reference IDs'), _('supannRefId - IDs/links for this entity on other systems'),
<               'supannRefId', FALSE,
<               '', '',
<                // Validation regexp: it must have a prefix
<               '/^{[^}]+}.+$/'
<             )
<           ),