Set before_end_lease event as DONE

Now Blazar sets the before_end_lease status as DONE, when the time of
the event comes and is properly processed.

Change-Id: I854269d15d4f5d8727187f10c6bc26d01c5ffb12
Closes-bug: #1316982

climate/manager/service.py

@@ -416,7 +416,7 @@ class ManagerService(service_utils.RPCServer):
             self._basic_action(lease_id, event_id, 'on_end', 'deleted')
 
     def before_end_lease(self, lease_id, event_id):
-        pass
+        db_api.event_update(event_id, {'status': 'DONE'})
 
     def _basic_action(self, lease_id, event_id, action_time,
                       reservation_status=None):

climate/tests/manager/test_service.py

@@ -1073,6 +1073,7 @@ class ServiceTestCase(tests.TestCase):
 
     def test_before_end_lease(self):
         self.manager.before_end_lease(self.lease_id, '1')
+        self.event_update.assert_called_once_with('1', {'status': 'DONE'})
 
     def test_basic_action_no_res_status(self):
         self.patch(self.manager, 'get_lease').return_value = self.lease