Update tests to work with dynamic es_versions

test/integration/xpack-standard.yml

@@ -2,6 +2,8 @@
 ---
 - name: Elasticsearch Xpack tests - no security and manual download
   hosts: localhost
+  tasks:
+    - include: elasticsearch/test/integration/debug.yml
   roles:
     - { role: elasticsearch, es_api_port: 9200, es_config: { "http.port": 9200, "transport.tcp.port":9300, discovery.zen.ping.unicast.hosts: "localhost:9300" }, es_instance_name: "security_node" }
   vars:
@@ -12,4 +14,4 @@
     es_xpack_features:
       - monitoring
       - graph
-      - ml
+      - ml