Replaced underscores with hyphens in cluster names and domains

Change-Id: I90d163602a0915b23f25f9f4d799799c0336e664
diff --git a/classes/cluster/ceph-ha/infra/init.yml b/classes/cluster/ceph-ha/infra/init.yml
index c4c7d0b..41a4387 100644
--- a/classes/cluster/ceph-ha/infra/init.yml
+++ b/classes/cluster/ceph-ha/infra/init.yml
@@ -17,7 +17,7 @@
 #    infra_config_deploy_address: 192.168.10.90
 
     cluster_domain: ceph-ha.local
-    cluster_name: ceph_ha
+    cluster_name: ceph-ha
     apt_mk_version: nightly
     primary_interface: ens3
   linux: