VOL-4465 raise ONU/OLT deleted events

Change-Id: I8f8aea3dcf97996816f8a856b05e751f7c391ee4
diff --git a/rw_core/core/device/agent.go b/rw_core/core/device/agent.go
index d819fae..1adf88c 100755
--- a/rw_core/core/device/agent.go
+++ b/rw_core/core/device/agent.go
@@ -209,6 +209,8 @@
 	if err := agent.dbProxy.Remove(ctx, agent.deviceID); err != nil {
 		return err
 	}
+	//send the device event to the message bus
+	_ = agent.deviceMgr.Agent.SendDeviceDeletedEvent(ctx, agent.device, time.Now().Unix())
 
 	close(agent.exitChannel)