ui_test_core: fix ERP5Zuite syntax error

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

01:10:11

canceled ERP5.CodingStyleTest-Zope4Py3-py2

canceled ERP5.UnitTest-Zope4Py3

03:09:45

failed ERP5.UnitTest-Zope4Py3-Py2

01:40:00

failed ERP5.CodingStyleTest-Zope4Py3-py2

00:54:01