fix model domains to valid names

Change-Id: Ia89d35ffb204401ac05c11ac877a9a3b69e56745
diff --git a/classes/cluster/k8s_ha_contrail/infra/init.yml b/classes/cluster/k8s_ha_contrail/infra/init.yml
index a624371..fad2edc 100644
--- a/classes/cluster/k8s_ha_contrail/infra/init.yml
+++ b/classes/cluster/k8s_ha_contrail/infra/init.yml
@@ -9,7 +9,7 @@
     infra_config_address: 172.16.10.100
     infra_config_deploy_address: 192.168.10.100
 
-    cluster_domain: k8s_ha_contrail.local
+    cluster_domain: k8s-ha-contrail.local
     cluster_name: k8s_ha_contrail
     apt_mk_version: nightly
   linux: