scripts/integration: fix mismerge -- wait for $check_ports (#1504)

scripts/integration.sh

@@ -33,4 +33,4 @@ if [ -f /proc/$pid/winpid ]; then
   echo "Windows detected, passing winpid $pid to port waiter"
 fi
 
-python scripts/wait_for_listening_port.py 3000 8000 --timeout=600 --server-pid "$pid"
+python scripts/wait_for_listening_port.py $check_ports --timeout=600 --server-pid "$pid"