order rr references by id

make order for reference records returned by `rr_get_references()`
persistent by sorting them by their `id` attribute

this makes `RRReferencesTest::test_get_references` work, see 1and1#198

dim/dim/rpc.py

@@ -2622,7 +2622,7 @@ def rr_object(rr):
  not (not delete and ref.type not in IP_RELATED and rr.type not in IP_RELATED and root.type in IP_RELATED):
  nodes.append(ref)
  graph[rr.id].append(ref.id)
- return {'records': [rr_object(records[r]) for r in records], 'graph': graph, 'root': root.id}
+ return {'records': sorted([rr_object(records[r]) for r in records], key=lambda x: x['id']), 'graph': graph, 'root': root.id}
 
  @updating
  def rr_edit(self, id, views=None, references=None, **kwargs):