py2/py3: stop using deprecated string functions, that are removed in python 3.

9 jobs for for_testrunner_1 in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

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passed ERP5.CodingStyleTest-TestRunner1

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failed ERP5.PerformanceTest-Master

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passed ERP5.PerformanceTest-TestRunner1

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failed ERP5.UnitTest-Master

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failed ERP5.UnitTest-TestRunner1

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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 Wendelin.UnitTest-Master

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