slapos_cloud: directly search follow_up value on parent Compute Node

master/bt5/slapos_cloud/SkinTemplateItem/portal_skins/slapos_cloud/Person_findPartition.py

@@ -7,7 +7,7 @@ assert project_uid
 compute_partition = None
 filter_kw_copy = filter_kw.copy()
 query_kw = {
-  'follow_up__uid': project_uid,
+  'parent__follow_up__uid': project_uid,
   'software_release_url': software_release_url,
   'portal_type': 'Compute Partition',
 }