test_result: fix a pylint warning

19 jobs for master in 0 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

02:03:40

failed ERP5.PerformanceTest-Master

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failed ERP5.UnitTest-Master

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failed ERP5.UnitTest-Master.Medusa

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passed SlapOS.Eggs.UnitTest-Master.Python2

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passed SlapOS.Eggs.UnitTest-Master.Python3

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passed ERP5.CodingStyleTest-Master

03:33:03

failed ERP5.CodingStyleTest-Master

04:35:37

created ERP5.CodingStyleTest-Master
passed ERP5.CodingStyleTest-Master

01:39:01

failed ERP5.CodingStyleTest-Master

failed ERP5.PerformanceTest-Master

00:32:19

failed ERP5.UnitTest-Master

02:58:17

failed ERP5.UnitTest-Master.Medusa

03:00:19

passed SlapOS.Eggs.UnitTest-Master.Python2

00:31:14

passed SlapOS.Eggs.UnitTest-Master.Python2

00:34:39

passed SlapOS.Eggs.UnitTest-Master.Python3

00:17:49

passed SlapOS.Eggs.UnitTest-Master.Python3

00:10:53

passed SlapOS.Eggs.UnitTest-Master.Python3

00:16:36