erp5_dqe: define encoding in scripts that need it

4 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed SlapOS.Eggs.UnitTest-Master.Python2

04:16:47

passed SlapOS.Eggs.UnitTest-Master.Python3

00:37:33

passed SlapOS.Eggs.UnitTest-Master.Python3

00:43:44

passed SlapOS.Eggs.UnitTest-Master.Python3

01:26:25