ung_role: fix test teardown

Abort transaction, we do not need changes made by test to persist.

Execute pending activities before removing persons, the pending
activities might be relying on the existence of persons.

bt5/erp5_web_ung_role/TestTemplateItem/portal_components/test.erp5.testUNGSecurity.py

@@ -39,6 +39,8 @@ class TestUNGSecurity(ERP5TypeTestCase):
     return "Test UNG Security"
 
   def beforeTearDown(self):
+    self.abort()
+    self.tic()
     person_module = self.getPersonModule()
     person_module.manage_delObjects(list(person_module.objectIds()))
     self.tic()