erp5_hal_json_style: Make sure that keys in parallel_list_field are translated

See merge request !1490
5 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

00:45:51

passed ERP5.UnitTest-Master

01:48:34

failed ERP5.UnitTest-Master.Medusa

02:31:48

passed SlapOS.Eggs.UnitTest-Master.Python2

00:21:15

passed SlapOS.Eggs.UnitTest-Master.Python3

00:22:38