slapos_slap_tool: (test) Replace pyxml by lxml

See merge request !424
6 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed SlapOS-Master.UnitTest-Master

01:27:40

passed SlapOS.Eggs.UnitTest-Master.Python2

00:11:47

passed SlapOS.Eggs.UnitTest-Master.Python3

00:14:05

passed SlapOS-Master.UnitTest-Master

01:23:42

passed SlapOS.Eggs.UnitTest-Master.Python2

00:11:36

passed SlapOS.Eggs.UnitTest-Master.Python3

00:12:39