ERP5TypeTestSuite: don't use sys.maxint for python3 compatibility

4 jobs for zope4py3 in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Zope4Py3

01:23:46

failed ERP5.UnitTest-Zope4Py3

02:13:32

failed ERP5.UnitTest-Zope4Py3-Py2

02:21:16

failed ERP5.UnitTest-Zope4Py3-Py2

04:34:55