testnode: supports python3

since config['software_list'] is used several times, it must be a real
list object and not a filter object

See merge request !1602
6 jobs for feat/erp5_util_python3 in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

00:52:49

failed ERP5.PerformanceTest-Master

00:25:25

passed ERP5.UnitTest-Master

01:27:40

failed ERP5.UnitTest-Master.Medusa

01:22:44

passed SlapOS.Eggs.UnitTest-Master.Python2

00:12:26

passed SlapOS.Eggs.UnitTest-Master.Python3

00:17:43