Update trymcp image

* add ability to specify gateway for Vm (DMZ case) via metadata;
* add missed copy for script adding default keycloak user;

Change-Id: If4e72c775031f23d67a01546c31c3e488ea516bd
Related-Prod: PROD-27660
diff --git a/trymcp-day01-image/template.json b/trymcp-day01-image/template.json
index 021c13f..0cee60b 100644
--- a/trymcp-day01-image/template.json
+++ b/trymcp-day01-image/template.json
@@ -30,6 +30,11 @@
       "destination": "/opt/bootstrap.saltstack.com.sh"
     },
     {
+      "type": "file",
+      "source": "files/opt/add_keycloak_service_user.sh",
+      "destination": "/opt/add_keycloak_service_user.sh"
+    },
+    {
       "environment_vars": [
         "UBUNTU_BASEURL={{ user `ubuntu_baseurl` }}",
         "PACKER_OFFLINE_BUILD=true"