Fixed lxc network config

Change-Id: Ib624c10915ce903bb91876e23a707607c4199a2b
diff --git a/playbooks/roles/lab-lava-lxcnet/templates/lxc-default.j2 b/playbooks/roles/lab-lava-lxcnet/templates/lxc-default.j2
index 169055d..90f7f92 100644
--- a/playbooks/roles/lab-lava-lxcnet/templates/lxc-default.j2
+++ b/playbooks/roles/lab-lava-lxcnet/templates/lxc-default.j2
@@ -1,3 +1,3 @@
-lxc.network.type = veth
-lxc.network.flags = up
-lxc.network.link = {{ lxc_bridge_name }}
+lxc.net.0.type = veth
+lxc.net.0.flags = up
+lxc.net.0.link = {{ lxc_bridge_name }}