fix restore triggers error

The 'add_trigger' function may raise exception when initializing a trigger,
it will cause the operationengine service always quit, we need to catch it to avaid that.

Change-Id: I468956c180d3a1ca5ece6b6ca58ade612f6fa5ad

karbor/services/operationengine/manager.py

@@ -114,8 +114,15 @@ class OperationEngineManager(manager.Manager):
                 break
 
             for trigger in triggers:
-                self.trigger_manager.add_trigger(trigger.id, trigger.type,
-                                                 trigger.properties)
+                try:
+                    self.trigger_manager.add_trigger(trigger.id, trigger.type,
+                                                     trigger.properties)
+                except Exception as e:
+                    LOG.error('Add trigger (id: "%s" type: "%s" properties: '
+                              '"%s") to manager error, reason: %s',
+                              trigger.id, trigger.type, trigger.properties,
+                              str(e))
+
             if len(triggers) < limit:
                 break
             marker = triggers[-1].id