Parameterized linux_system_codename

Change-Id: Ic527bfa74b4caf7e0bb5d157bfae024f2cf53111
diff --git a/reclass/storage/system/stacklightv2_server_cluster.yml b/reclass/storage/system/stacklightv2_server_cluster.yml
index c72ac2c..81bf22a 100644
--- a/reclass/storage/system/stacklightv2_server_cluster.yml
+++ b/reclass/storage/system/stacklightv2_server_cluster.yml
@@ -3,6 +3,7 @@
     stacklight_monitor_node01_hostname: mon01
     stacklight_monitor_node02_hostname: mon02
     stacklight_monitor_node03_hostname: mon03
+    stacklight_monitor_system_codename: xenial
   reclass:
     storage:
       node:
@@ -15,7 +16,7 @@
           - cluster.${_param:cluster_name}.stacklight.client
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: xenial
+            linux_system_codename: ${_param:stacklight_monitor_system_codename}
             single_address: ${_param:stacklight_monitor_node01_address}
             keepalived_vip_priority: 103
         stacklight_server_node02:
@@ -26,7 +27,7 @@
           - cluster.${_param:cluster_name}.stacklight.server
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: xenial
+            linux_system_codename: ${_param:stacklight_monitor_system_codename}
             single_address: ${_param:stacklight_monitor_node02_address}
             keepalived_vip_priority: 102
         stacklight_server_node03:
@@ -37,6 +38,6 @@
           - cluster.${_param:cluster_name}.stacklight.server
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: xenial
+            linux_system_codename: ${_param:stacklight_monitor_system_codename}
             single_address: ${_param:stacklight_monitor_node03_address}
             keepalived_vip_priority: 101