WSGITask: Patch should be enabled only if waitress egg is available

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

02:17:10

passed ERP5.PerformanceTest-Master

00:24:10

failed ERP5.UnitTest-Master.Medusa

04:51:56

passed SlapOS.Eggs.UnitTest-Master.Python2

00:31:22

passed SlapOS.Eggs.UnitTest-Master.Python3

00:32:37