Allow users to set/update their display name in LDAP

app/services/ldap_service.rb

@@ -50,7 +50,7 @@ class LdapService < ApplicationService
       treebase = ldap_config["base"]
     end
 
-    attributes = %w{dn cn uid mail admin service}
+    attributes = %w{dn cn uid mail displayName admin service}
     filter     = Net::LDAP::Filter.eq("uid", args[:uid] || "*")
 
     entries = ldap_client.search(base: treebase, filter: filter, attributes: attributes)
@@ -59,6 +59,7 @@ class LdapService < ApplicationService
       {
         uid: e.uid.first,
         mail: e.try(:mail) ? e.mail.first : nil,
+        display_name: e.try(:displayName) ? e.displayName.first : nil,
         admin: e.try(:admin) ? 'admin' : nil,
         service: e.try(:service)
       }