[FAB-5038] Generate artifacts if they don't exist

If you run ./byfn -m up prior to running
./byfn -m generate, things will fail - which
would normally be OK except in the case where
you are running the Docker daemon as root -
which is the default on Linux systems.  The issue
is that the Docker daemon will automatically
generate host paths for volumes if they don't exist
and they will be owned by whoever is running the
Docker process resulting in the error reported
in FAB-5038.

To fix this, simply check for the existence of
the crypto-config folder and if it does not
exist run the equivalent commands as the
generate option

Change-Id: Ic5b48682a527951ac6eab5b5cf2d0fc6dbdaad56
Signed-off-by: Gari Singh <gari.r.singh@gmail.com>

first-network/byfn.sh

@@ -95,6 +95,12 @@ function removeUnwantedImages() {
 
 # Generate the needed certificates, the genesis block and start the network.
 function networkUp () {
+  # generate artifacts if they don't exist
+  if [ ! -d "crypto-config" ]; then
+    generateCerts
+    replacePrivateKey
+    generateChannelArtifacts
+  fi
   CHANNEL_NAME=$CHANNEL_NAME TIMEOUT=$CLI_TIMEOUT docker-compose -f $COMPOSE_FILE up -d 2>&1
   if [ $? -ne 0 ]; then
     echo "ERROR !!!! Unable to start network"