Replaced underscores with hyphens in cluster names and domains

Change-Id: I90d163602a0915b23f25f9f4d799799c0336e664
diff --git a/classes/cluster/k8s-ha-contrail/infra/init.yml b/classes/cluster/k8s-ha-contrail/infra/init.yml
index 7cb36c7..5fbbbea 100644
--- a/classes/cluster/k8s-ha-contrail/infra/init.yml
+++ b/classes/cluster/k8s-ha-contrail/infra/init.yml
@@ -10,7 +10,7 @@
     infra_config_deploy_address: 192.168.10.90
 
     cluster_domain: k8s-ha-contrail.local
-    cluster_name: k8s_ha_contrail
+    cluster_name: k8s-ha-contrail
     apt_mk_version: nightly
   linux:
     network: