parametrize os version for gtw and cmp
diff --git a/reclass/storage/system/openstack_compute_multi.yml b/reclass/storage/system/openstack_compute_multi.yml
index 0340e9c..86092db 100644
--- a/reclass/storage/system/openstack_compute_multi.yml
+++ b/reclass/storage/system/openstack_compute_multi.yml
@@ -12,7 +12,7 @@
           - cluster.${_param:cluster_name}.openstack.compute
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: trusty
+            linux_system_codename: ${_param:linux_system_codename}
             single_address: 172.16.10.105
         openstack_compute_node02:
           name: ${_param:openstack_compute_node02_hostname}
@@ -21,5 +21,5 @@
           - cluster.${_param:cluster_name}.openstack.compute
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: trusty
+            linux_system_codename: ${_param:linux_system_codename}
             single_address: 172.16.10.106