LDAP: don't make us of global constants (completing, was removed with latest additions to update.php)

apps/user_ldap/settings.php

@@ -52,8 +52,8 @@ foreach($params as $param){
 }
 
 // settings with default values
-$tmpl->assign( 'ldap_port', OCP\Config::getAppValue('user_ldap', 'ldap_port', OC_USER_BACKEND_LDAP_DEFAULT_PORT));
-$tmpl->assign( 'ldap_display_name', OCP\Config::getAppValue('user_ldap', 'ldap_display_name', OC_USER_BACKEND_LDAP_DEFAULT_DISPLAY_NAME));
+$tmpl->assign( 'ldap_port', OCP\Config::getAppValue('user_ldap', 'ldap_port', '389'));
+$tmpl->assign( 'ldap_display_name', OCP\Config::getAppValue('user_ldap', 'ldap_display_name', 'uid'));
 $tmpl->assign( 'ldap_group_member_assoc_attribute', OCP\Config::getAppValue('user_ldap', 'ldap_group_member_assoc_attribute', 'uniqueMember'));
 $tmpl->assign( 'ldap_agent_password', base64_decode(OCP\Config::getAppValue('user_ldap', 'ldap_agent_password')));