ERP5: initial python3 support

See merge request !1257
13 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed Cloudooo.UnitTest-Master

00:15:47

passed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

00:20:36

passed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

10:55:07

failed SlapOS.Eggs.UnitTest-Master.Python2

00:16:10

failed SlapOS.Eggs.UnitTest-Master.Python3

00:19:59

failed SlapOS.SoftwareReleases.IntegrationTest-Master

10:36:26

passed SlapOS.Theia.ResilienceTest-Master-ERP5

10:16:55

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

00:38:32

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

10:27:33

passed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

00:38:02

failed SlapOS.Eggs.UnitTest-Master.Python2

00:26:50

failed SlapOS.Eggs.UnitTest-Master.Python3

00:24:09

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master