VOL-1218 cleaning error in log on flow update

Change-Id: Ife47fd2b2bcc6c88e268f23dde574d13f2842761
diff --git a/voltha/adapters/openolt/openolt_flow_mgr.py b/voltha/adapters/openolt/openolt_flow_mgr.py
index 69e712a..c984fe0 100644
--- a/voltha/adapters/openolt/openolt_flow_mgr.py
+++ b/voltha/adapters/openolt/openolt_flow_mgr.py
@@ -147,6 +147,7 @@
         if fd.get_goto_table_id(flow) is not None and not 'pop_vlan' in \
                 action_info:
             self.log.debug('being taken care of by ONU', flow=flow)
+            return
 
         if not 'output' in action_info and 'metadata' in classifier_info:
             #find flow in the next table