Tutorial doc on test network with BFT ordering service

This patch updates test_network.md:
- To update the network.sh help text output
- Add brief instructions for running a test network with BFT ordering service

Signed-off-by: Tatsuya Sato <tatsuya.sato.so@hitachi.com>

docs/source/test_network.md

@@ -53,19 +53,18 @@ Usage:
 
     Flags:
     Used with network.sh up, network.sh createChannel:
-    -ca <use CAs> -  Use Certificate Authorities to generate network crypto material
+    -ca - Use Certificate Authorities to generate network crypto material
+    -bft - Use Orderers with consensus type BFT (Not available in Fabric v2.x)
     -c <channel name> - Name of channel to create (defaults to "mychannel")
     -s <dbtype> - Peer state database to deploy: goleveldb (default) or couchdb
     -r <max retry> - CLI times out after certain number of attempts (defaults to 5)
     -d <delay> - CLI delays for a certain number of seconds (defaults to 3)
-    -i <imagetag> - Docker image tag of Fabric to deploy (defaults to "latest")
-    -cai <ca_imagetag> - Docker image tag of Fabric CA to deploy (defaults to "latest")
     -verbose - Verbose mode
 
     Used with network.sh deployCC
     -c <channel name> - Name of channel to deploy chaincode to
     -ccn <name> - Chaincode name.
-    -ccl <language> - Programming language of the chaincode to deploy: go (default), java, javascript, typescript
+    -ccl <language> - Programming language of the chaincode to deploy: go, java, javascript, typescript
     -ccv <version>  - Chaincode version. 1.0 (default), v2, version3.x, etc
     -ccs <sequence>  - Chaincode definition sequence. Must be an integer, 1 (default), 2, 3, etc
     -ccp <path>  - File path to the chaincode.
@@ -76,13 +75,15 @@ Usage:
     -h - Print this message
 
  Possible Mode and flag combinations
-   up -ca -r -d -s -i -cai -verbose
-   up createChannel -ca -c -r -d -s -i -cai -verbose
-   createChannel -c -r -d -verbose
+   up -ca -r -d -s -verbose
+   up -bft -r -d -s -verbose
+   up createChannel -ca -c -r -d -s -verbose
+   up createChannel -bft -c -r -d -s -verbose
+   createChannel -bft -c -r -d -verbose
    deployCC -ccn -ccl -ccv -ccs -ccp -cci -r -d -verbose
 
  Examples:
-   network.sh up createChannel -ca -c mychannel -s couchdb -i 2.0.0
+   network.sh up createChannel -ca -c mychannel -s couchdb
    network.sh createChannel -c channelName
    network.sh deployCC -ccn basic -ccp ../asset-transfer-basic/chaincode-javascript/ -ccl javascript
    network.sh deployCC -ccn mychaincode -ccp ./user/mychaincode -ccv 1 -ccl javascript
@@ -544,6 +545,46 @@ below provide a guided tour of what happens when you issue the command of
   channel, the peer cli initializes the chaincode using the `Init` and invokes
   the chaincode to put initial data on the ledger.
 
+## Bring up the network using BFT ordering service
+
+You can try out the Byzantine Fault Tolerant (BFT) ordering service, newly added since v3.0,
+together with the test network.
+
+If you would like to bring up a network using BFT ordering service, first run the following
+command to bring down any running networks:
+
+```
+./network.sh down
+```
+
+Then, with the BFT flag (-bft), run the network up and create a channel on that network:
+
+```
+./network.sh up -bft
+./network.sh createChannel -bft
+```
+
+These commands will start a Fabric network consisting of 4 orderers managed by OrdererOrg,
+1 peer managed by Org1 and 1 peer managed by Org2.
+They also will create a channel named "mychannel" in which the 4 orderers with BFT consensus type and the 2 peers participate.
+
+After you have created the channel with BFT consensus type,
+you can start a chaincode on the channel or interact with your network as well as the previous instructions.
+For example:
+
+```
+./network.sh deployCC -ccn basic -ccp ../asset-transfer-basic/chaincode-go -ccl go
+...
+```
+
+### Next steps to use BFT ordering service
+
+To understand more about the BFT ordering service, refer to the following information:
+
+- [What is BFT and what is BFT Ordering service?](./orderer/ordering_service.md)
+- [Adding orderer to an existing network](./create_channel/add_orderer.md)
+- [Configuring and operating a BFT ordering service](./bft_configuration.md)
+
 ## Troubleshooting
 
 If you have any problems with the tutorial, review the following: