Split start_nodes script ssh commands to individual scripts (#642)

multinode-demo/remote_leader.sh

@@ -0,0 +1,16 @@
+#!/bin/bash -e
+
+[[ -n $FORCE ]] || exit
+
+mkdir -p ~/.ssh ~/solana ~/.cargo/bin
+sudo apt-get --assume-yes install rsync libssl-dev
+chmod 600 ~/.ssh/authorized_keys ~/.ssh/id_rsa
+
+PATH="$HOME"/.cargo/bin:"$PATH"
+
+./fetch-perf-libs.sh
+
+# Run setup
+USE_INSTALL=1 ./multinode-demo/setup.sh -p
+USE_INSTALL=1 SOLANA_CUDA=1 ./multinode-demo/leader.sh >leader.log 2>&1 &
+USE_INSTALL=1 ./multinode-demo/drone.sh >drone.log 2>&1 &