testing/testcase: run `slapos node report` at least 3 times

In a scenario of an instance with child instances which does not properly
support destruction, a scenario like this happens:

 1. first report detect that it's destroying a root partition but child
partitions are still started and request destruction of these child instances
 2. child partitions are destroyed
 3. root partition is destroyed

For this case we need to run 3 times
33 jobs for fix/proxy_destroy_partition in 0 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  External
passed SlapOS.Eggs.UnitTest-Jerome.Python2

00:25:47

failed SlapOS.Eggs.UnitTest-Jerome.Python3

00:24:28

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

10:09:33

passed SlapOS.Eggs.UnitTest-Jerome.Python2

00:34:21

passed SlapOS.Eggs.UnitTest-Jerome.Python2

00:33:25

passed SlapOS.Eggs.UnitTest-Jerome.Python2

00:29:03

passed SlapOS.Eggs.UnitTest-Jerome.Python2

00:27:40

passed SlapOS.Eggs.UnitTest-Jerome.Python2

00:26:35

passed SlapOS.Eggs.UnitTest-Jerome.Python2

00:55:02

passed SlapOS.Eggs.UnitTest-Jerome.Python2

00:41:11

passed SlapOS.Eggs.UnitTest-Jerome.Python2

00:38:18

passed SlapOS.Eggs.UnitTest-Jerome.Python2

00:40:15

passed SlapOS.Eggs.UnitTest-Jerome.Python2

00:29:53

passed SlapOS.Eggs.UnitTest-Jerome.Python3

00:29:30

passed SlapOS.Eggs.UnitTest-Jerome.Python3

00:35:50

passed SlapOS.Eggs.UnitTest-Jerome.Python3

00:36:54

passed SlapOS.Eggs.UnitTest-Jerome.Python3

00:18:13

passed SlapOS.Eggs.UnitTest-Jerome.Python3

00:32:02

passed SlapOS.Eggs.UnitTest-Jerome.Python3

00:31:42

passed SlapOS.Eggs.UnitTest-Jerome.Python3

00:30:52

passed SlapOS.Eggs.UnitTest-Jerome.Python3

00:34:15

passed SlapOS.Eggs.UnitTest-Jerome.Python3

00:28:53

passed SlapOS.Eggs.UnitTest-Jerome.Python3

00:32:36

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

03:43:07

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

02:57:28

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

03:23:43

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

03:22:47

canceled SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

canceled SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

canceled SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3