slapos_cloud: Keep using older group_id when generate new references

  When upgrade the site, we shouldn't revert the count, else it may lead to duplicated values.

master/bt5/slapos_cloud/WorkflowTemplateItem/portal_workflow/person_slap_interface_workflow/script_Person_requestSoftwareInstance.py

@@ -52,7 +52,7 @@ else:
     context.REQUEST.set('request_instance_tree', None)
     return
   instance_tree_reference = "HOSTSUBS-%s" % context.getPortalObject().portal_ids\
-      .generateNewId(id_group='slap_instance_tree_reference', id_generator='uid')
+      .generateNewId(id_group='slap_hosting_subscription_reference', id_generator='uid')
   request_instance_tree = portal.getDefaultModule(portal_type=instance_tree_portal_type).newContent(
     portal_type=instance_tree_portal_type,
     reference=instance_tree_reference,

master/bt5/slapos_cloud/WorkflowTemplateItem/portal_workflow/person_slap_interface_workflow/script_Person_requestSoftwareInstance.xml

@@ -52,6 +52,12 @@
             <key> <string>_params</string> </key>
             <value> <string>state_change</string> </value>
         </item>
+        <item>
+            <key> <string>description</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
         <item>
             <key> <string>id</string> </key>
             <value> <string>script_Person_requestSoftwareInstance</string> </value>