Add debian.single in root init

To have it an all the node add it in root init file

Change-Id: I842e87c263729218754ac79febf043b9b91a36d1
diff --git a/classes/cluster/virtual-pike-ovs-dpdk/init.yml b/classes/cluster/virtual-pike-ovs-dpdk/init.yml
index 1fd9136..02c238c 100644
--- a/classes/cluster/virtual-pike-ovs-dpdk/init.yml
+++ b/classes/cluster/virtual-pike-ovs-dpdk/init.yml
@@ -1,6 +1,7 @@
 classes:
 - system.linux.network.dynamic_hosts
 - system.linux.system.single
+- system.linux.system.single.debian
 - cluster.virtual-pike-ovs-dpdk.infra
 - cluster.virtual-pike-ovs-dpdk.openstack
 - system.openssh.server.team.lab