Enable experimental mode by default

Experimental mode for docker daemon allows
to get logs from swarm services, e.g.
docker service logs <service_id>
diff --git a/docker/host.yml b/docker/host.yml
index cf19bfd..f7649b5 100644
--- a/docker/host.yml
+++ b/docker/host.yml
@@ -4,6 +4,7 @@
 parameters:
   docker:
     host:
+      experimental: true
       insecure_registries:
         - ${_param:cluster_vip_address}:5000
         - ${_param:cluster_public_host}:5000