filer: adjust meta data events to received timestamp

if a client is already connected and start from t0. A message recieved at t+1 but with timestamp t-1 may not be processed by the client.

This commit changes to the event received time, so the replication can be ordered.

weed/filer/meta_aggregator.go

@@ -108,7 +108,7 @@ func (ma *MetaAggregator) subscribeToOneFiler(f *Filer, self string, peer string
 		}
 		dir := event.Directory
 		// println("received meta change", dir, "size", len(data))
-		ma.MetaLogBuffer.AddToBuffer([]byte(dir), data, event.TsNs)
+		ma.MetaLogBuffer.AddToBuffer([]byte(dir), data, 0)
 		if maybeReplicateMetadataChange != nil {
 			maybeReplicateMetadataChange(event)
 		}