Use a common solana user on all testnet instances

net/scripts/create-solana-user.sh

@@ -0,0 +1,27 @@
+#!/bin/bash -ex
+
+[[ $(uname) = Linux ]] || exit 1
+[[ $USER = root ]] || exit 1
+
+adduser solana --gecos "" --disabled-password --quiet
+adduser solana sudo
+echo "solana ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
+id solana
+
+[[ -r /solana-id_ecdsa ]] || exit 1
+[[ -r /solana-id_ecdsa.pub ]] || exit 1
+
+sudo -u solana bash -c "
+  mkdir -p /home/solana/.ssh/
+  cd /home/solana/.ssh/
+  cp /solana-id_ecdsa.pub authorized_keys
+  umask 377
+  cp /solana-id_ecdsa id_ecdsa
+  echo \"
+    Host *
+    BatchMode yes
+    IdentityFile ~/.ssh/id_ecdsa
+    StrictHostKeyChecking no
+  \" > config
+"
+