Fix test-network to work with BFT consensus.

Added a new option for creating channel:
Running ./network.sh createChannel -bft will initiate a channel running BFT orderers.

Signed-off-by: Arkadi Piven <arkadi.piven@ibm.com>

test-network/README.md

@@ -2,6 +2,13 @@
 
 You can use the `./network.sh` script to stand up a simple Fabric test network. The test network has two peer organizations with one peer each and a single node raft ordering service. You can also use the `./network.sh` script to create channels and deploy chaincode. For more information, see [Using the Fabric test network](https://hyperledger-fabric.readthedocs.io/en/latest/test_network.html). The test network is being introduced in Fabric v2.0 as the long term replacement for the `first-network` sample.
 
+If you are planning to run the test network with consesnsus type BFT then please pass `-bft` flag as input to the `network.sh` script when creating the channel.
+That is to create a channel use:
+
+```bash
+./network.sh createChannel -bft
+```
+
 Before you can deploy the test network, you need to follow the instructions to [Install the Samples, Binaries and Docker Images](https://hyperledger-fabric.readthedocs.io/en/latest/install.html) in the Hyperledger Fabric documentation.
 
 ## Using the Peer commands