Parameterized linux_system_codename

Change-Id: Ic527bfa74b4caf7e0bb5d157bfae024f2cf53111
diff --git a/reclass/storage/system/stacklight_telemetry_cluster.yml b/reclass/storage/system/stacklight_telemetry_cluster.yml
index 12b1dae..b9e2640 100644
--- a/reclass/storage/system/stacklight_telemetry_cluster.yml
+++ b/reclass/storage/system/stacklight_telemetry_cluster.yml
@@ -3,6 +3,7 @@
     stacklight_telemetry_node01_hostname: mtr01
     stacklight_telemetry_node02_hostname: mtr02
     stacklight_telemetry_node03_hostname: mtr03
+    stacklight_telemetry_system_codename: xenial
   reclass:
     storage:
       node:
@@ -13,7 +14,7 @@
           - cluster.${_param:cluster_name}.stacklight.telemetry
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: xenial
+            linux_system_codename: ${_param:stacklight_telemetry_system_codename}
             single_address: ${_param:stacklight_telemetry_node01_address}
             keepalived_vip_priority: 103
         stacklight_telemetry_node02:
@@ -23,7 +24,7 @@
           - cluster.${_param:cluster_name}.stacklight.telemetry
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: xenial
+            linux_system_codename: ${_param:stacklight_telemetry_system_codename}
             single_address: ${_param:stacklight_telemetry_node02_address}
             keepalived_vip_priority: 102
         stacklight_telemetry_node03:
@@ -33,6 +34,6 @@
           - cluster.${_param:cluster_name}.stacklight.telemetry
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: xenial
+            linux_system_codename: ${_param:stacklight_telemetry_system_codename}
             single_address: ${_param:stacklight_telemetry_node03_address}
             keepalived_vip_priority: 101