Don't rsync leader.json on every iteration

multinode-demo/client.sh

@@ -35,9 +35,6 @@ if [[ $1 = --loop ]]; then
 fi
 
 rsync_leader_url=$(rsync_url "$leader")
-
-iteration=0
-while true; do
 (
   set -x
   mkdir -p "$SOLANA_CONFIG_CLIENT_DIR"
@@ -45,7 +42,12 @@ while true; do
 
   client_json="$SOLANA_CONFIG_CLIENT_DIR"/client.json
   [[ -r $client_json ]] || $solana_keygen -o "$client_json"
+)
 
+iteration=0
+while true; do
+  (
+    set -x
     $solana_bench_tps \
       -n "$count" \
       -l "$SOLANA_CONFIG_CLIENT_DIR"/leader.json \