follow-up-fix for 
9b4dbf0
basically we wanna look at the list that has inprogress events to inprogress+complete
Fixes: http://pulpito.ceph.com/kchai-2019-07-28_14:30:09-rados-wip-kefu2-testing-2019-07-28-1941-distro-basic-mira/4160881/
Signed-off-by: Kamoltat (Junior) Sirivadhna <ksirivad@redhat.com>
 
         self.wait_until_equal(lambda: len(self._events_in_progress()), 1,
                               timeout=self.EVENT_CREATION_PERIOD)
 
-        new_event = self._all_events()[0]
+        new_event = self._events_in_progress()[0]
         log.info(json.dumps(new_event, indent=1))
         self.assertIn("Rebalancing after osd.0 marked in", new_event['message'])