fix classmapping for cmn01 in ceph ha lab

Change-Id: Ib878b0ba1ba9be5fccc0fbee7f25d09bae331f5e
diff --git a/classes/cluster/ceph_ha/infra/config.yml b/classes/cluster/ceph_ha/infra/config.yml
index 806bbce..123cb65 100644
--- a/classes/cluster/ceph_ha/infra/config.yml
+++ b/classes/cluster/ceph_ha/infra/config.yml
@@ -87,7 +87,7 @@
             ceph_osd_node03_address:
               value_template: <<node_control_ip>>
         ceph_mon_01:
-          expression: <<node_hostname>>__equals__cmn03
+          expression: <<node_hostname>>__equals__cmn01
           cluster_param:
             ceph_mon_node01_address:
               value_template: <<node_control_ip>>