fixup! fixup! py2/py3: dict_key does not have sort().

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Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

00:35:20

passed ERP5.PerformanceTest-Master

00:26:24

failed ERP5.UnitTest-Master

01:10:35

failed ERP5.UnitTest-Master.Medusa

01:11:32

passed SlapOS.Eggs.UnitTest-Master.Python2

00:11:54

passed SlapOS.Eggs.UnitTest-Master.Python3

00:13:04