ERP5Workflow: Remove unused variable_default_value and use...

ERP5Workflow: Remove unused variable_default_value and use variable_default_expression instead (!1378).
8 jobs for arnau in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

00:37:14

passed ERP5.PerformanceTest-Master

00:23:54

failed ERP5.UnitTest-Master

01:26:09

failed ERP5.UnitTest-Master.Medusa

01:45:52

passed SlapOS.Eggs.UnitTest-Master.Python2

00:08:31

passed SlapOS.Eggs.UnitTest-Master.Python3

00:12:50

passed SlapOS.Eggs.UnitTest-Master.Python2

00:09:37

passed SlapOS.Eggs.UnitTest-Master.Python3

00:14:30