Merge "Use e.exc_type instead of calling str on exception" into stable/newton

neutron/services/trunk/drivers/linuxbridge/agent/driver.py

@@ -140,7 +140,7 @@ class _TrunkAPI(object):
         except resources_rpc.ResourceNotFound:
             return None
         except oslo_messaging.RemoteError as e:
-            if 'CallbackNotFound' not in str(e):
+            if e.exc_type != 'CallbackNotFound':
                 raise
             LOG.debug("Trunk plugin disabled on server. Assuming port %s is "
                       "not a trunk.", port_id)