slapos_ui_jio_test: Skip to remove if document is None.

master/bt5/slapos_jio_ui_test/SkinTemplateItem/portal_skins/slapos_ui_test/ERP5Site_removeTestUserList.py

@@ -3,6 +3,7 @@ portal = context.getPortalObject()
 for cr in portal.portal_catalog(reference=["testSlapOSJSSubscribeUser", "demo_functional_user"],
                                portal_type="Credential Request"):
   related_person = cr.getDestinationDecisionValue()
+  if related_person is not None:
     portal.person_module.manage_delObjects(ids=[related_person.getId()])
   event_list = cr.getFollowUpRelatedValueList()
   if len(event_list):