open_api: support request body and fix py3 compatibility

14 jobs for feat/open_api_body in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-TestRunner1

03:07:36

failed ERP5.PerformanceTest-TestRunner1

00:34:50

failed ERP5.UnitTest-TestRunner1

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failed ERP5.UnitTest-TestRunner1

06:07:31

failed ERP5.UnitTest-TestRunner1

04:55:49

failed ERP5.UnitTest-TestRunner1

00:03:11

failed ERP5.UnitTest-TestRunner1

00:04:57

failed ERP5.UnitTest-TestRunner1

00:04:00

failed ERP5.UnitTest-TestRunner1

00:03:06

failed ERP5.UnitTest-TestRunner1

00:03:15

failed ERP5.UnitTest-TestRunner1

00:04:21

failed ERP5.UnitTest-TestRunner1

00:04:16

canceled ERP5.UnitTest-TestRunner1

03:06:02

failed ERP5.UnitTest-TestRunner1

06:48:14