[FAB-6047] Modify the default channel name

Change-Id: I3a030ca1685c1a99e9a66c1c8a323a531e8305ef
Signed-off-by: Liu Minhan <cxa13241930467@163.com>
Signed-off-by: Gari Singh <gari.r.singh@gmail.com>

orderer/sample_clients/broadcast_config/client.go

@@ -95,7 +95,7 @@ func main() {
 	flag.StringVar(&cmd.name, "cmd", "newChain", "The action that this client is requesting via the config transaction.")
 	flag.StringVar(&cmd.args.consensusType, "consensusType", genConf.Orderer.OrdererType, "In case of a newChain command, the type of consensus the ordering service is running on.")
 	flag.StringVar(&cmd.args.creationPolicy, "creationPolicy", "AcceptAllPolicy", "In case of a newChain command, the chain creation policy this request should be validated against.")
-	flag.StringVar(&cmd.args.chainID, "chainID", "NewChannelId", "In case of a newChain command, the chain ID to create.")
+	flag.StringVar(&cmd.args.chainID, "chainID", "mychannel", "In case of a newChain command, the chain ID to create.")
 	flag.Parse()
 
 	conn, err := grpc.Dial(srv, grpc.WithInsecure())