fixed client demo (#325)

* fixed client demo

multinode-demo/client.sh

@@ -1,11 +1,15 @@
 #!/bin/bash -e
 
 if [[ -z "$1" ]]; then
-  echo "usage: $0 [network path to solana repo on leader machine]"
+  echo "usage: $0 [network path to solana repo on leader machine] [number of nodes in the network if greater then 1]"
   exit 1
 fi
 
 LEADER="$1"
+COUNT="$2"
+if [[ -z "$2" ]]; then
+    COUNT=1
+fi
 
 set -x
 export RUST_LOG=solana=info
@@ -13,4 +17,4 @@ rsync -v -e ssh "$LEADER/leader.json" .
 rsync -v -e ssh "$LEADER/mint-demo.json" .
 
 cargo run --release --bin solana-client-demo -- \
-  -l leader.json < mint-demo.json 2>&1 | tee client.log
+  -l leader.json -n $COUNT -d < mint-demo.json 2>&1 | tee client.log