Managed Resources for Software Release Tests

Introduce new "Managed Resources" and assorted fixes accompanying slapos!840 

Also respect meaning of verbose (more output in the console) and debug (drop in debugger on errors and keep things around for inspection)

See merge request !259
11 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed SlapOS-Master.UnitTest-Master

02:31:16

passed SlapOS.Eggs.UnitTest-Master.Python2

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passed SlapOS.Eggs.UnitTest-Master.Python3

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passed SlapOS.Eggs.UnitTest-Master.Python2

00:36:55

passed SlapOS.Eggs.UnitTest-Master.Python2

00:38:15

passed SlapOS.Eggs.UnitTest-Master.Python2

00:32:29

failed SlapOS.Eggs.UnitTest-Master.Python2

00:41:45

passed SlapOS.Eggs.UnitTest-Master.Python3

00:09:35

passed SlapOS.Eggs.UnitTest-Master.Python3

00:11:57

failed SlapOS.Eggs.UnitTest-Master.Python3

00:18:28

passed SlapOS.Eggs.UnitTest-Master.Python3

00:14:42