fix: vehicle sim userdata should wait on apt lock (#13)

Co-authored-by: github-actions <salamida@amazon.com>

src/integ.full.ts

@@ -114,6 +114,20 @@ export class IntegTesting {
     const userData = `\
     set -euo pipefail
 
+    # Wait for any existing package install to finish
+    i=0
+    while true; do
+        if sudo fuser /var/{lib/{dpkg,apt/lists},cache/apt/archives}/lock >/dev/null 2>&1; then
+            i=0
+        else
+            i=\`expr $i + 1\`
+            if expr $i \>= 10 > /dev/null; then
+                break
+            fi
+        fi
+        sleep 1
+    done
+
     # Upgrade system and reboot if required
     apt update && apt upgrade -y
     if [ -f /var/run/reboot-required ]; then