rsync/airdrop only if ledger doesn't exist (eg, on first run after setup.sh)

multinode-demo/fullnode.sh

@@ -163,6 +163,8 @@ fi
   exit 1
 }
 
+tune_system
+
 rsync_url() { # adds the 'rsync://` prefix to URLs that need it
   declare url="$1"
 
@@ -183,10 +185,8 @@ rsync_url() { # adds the 'rsync://` prefix to URLs that need it
 }
 
 rsync_leader_url=$(rsync_url "$leader")
-
-tune_system
-
 set -ex
+if [[ ! -d "$ledger_config_dir" ]]; then
   $rsync -vPr "$rsync_leader_url"/config/ledger/ "$ledger_config_dir"
   [[ -d $ledger_config_dir ]] || {
     echo "Unable to retrieve ledger from $rsync_leader_url"
@@ -215,6 +215,7 @@ while true; do
     echo "Airdrop failed. Remaining retries: $retries"
     sleep 1
   done
+fi
 
 trap 'kill "$pid" && wait "$pid"' INT TERM
 # shellcheck disable=SC2086 # Don't want to double quote # maybe_rpc_port