software/slapos-testing: use nxdtest

We also try to switch the tests to use python -m unittest as a way of
invoking tests, instead of the deprecated python setup.py test
9 jobs for feat/nxdtest in 0 seconds
Status Job ID Name Coverage
  External
passed SlapOS.Eggs.UnitTest-Jerome.Python2

00:12:36

passed SlapOS.Eggs.UnitTest-Jerome.Python3

00:19:27

passed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

04:49:36

failed SlapOS.Eggs.UnitTest-Jerome.Python2

00:23:07

failed SlapOS.Eggs.UnitTest-Jerome.Python2

00:10:14

canceled SlapOS.Eggs.UnitTest-Jerome.Python2

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

10:37:44

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

07:05:13

canceled SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP