net/: Add solana-install test to sanity (#4438)

* Add instance creation date to motd

* Setup localtime

* Add solana-install test

net/scripts/install-rsync.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 #
-# Rsync setup for Snap builds
+# Rsync setup
 #
 set -ex
 

net/scripts/localtime.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+#
+# Setup timezone
+#
+set -ex
+
+[[ $(uname) = Linux ]] || exit 1
+[[ $USER = root ]] || exit 1
+
+ln -sf /usr/share/zoneinfo/America/Los_Angeles /etc/localtime