Parameterized linux_system_codename

Change-Id: Ic527bfa74b4caf7e0bb5d157bfae024f2cf53111
diff --git a/reclass/storage/system/physical_control_cluster.yml b/reclass/storage/system/physical_control_cluster.yml
index 4622e09..ebd0eb0 100644
--- a/reclass/storage/system/physical_control_cluster.yml
+++ b/reclass/storage/system/physical_control_cluster.yml
@@ -15,6 +15,7 @@
     infra_kvm_node01_public_address: ${_param:infra_kvm_node01_address}
     infra_kvm_node02_public_address: ${_param:infra_kvm_node02_address}
     infra_kvm_node03_public_address: ${_param:infra_kvm_node03_address}
+    infra_kvm_system_codename: trusty
 
   reclass:
     storage:
@@ -26,7 +27,7 @@
           - cluster.${_param:cluster_name}.infra.kvm
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: trusty
+            linux_system_codename: ${_param:infra_kvm_system_codename}
             single_address: ${_param:infra_kvm_node01_address}
             deploy_address: ${_param:infra_kvm_node01_deploy_address}
             public_address: ${_param:infra_kvm_node01_public_address}
@@ -38,7 +39,7 @@
           - cluster.${_param:cluster_name}.infra.kvm
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: trusty
+            linux_system_codename: ${_param:infra_kvm_system_codename}
             single_address: ${_param:infra_kvm_node02_address}
             deploy_address: ${_param:infra_kvm_node02_deploy_address}
             public_address: ${_param:infra_kvm_node02_public_address}
@@ -50,7 +51,7 @@
           - cluster.${_param:cluster_name}.infra.kvm
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: trusty
+            linux_system_codename: ${_param:infra_kvm_system_codename}
             single_address: ${_param:infra_kvm_node03_address}
             deploy_address: ${_param:infra_kvm_node03_deploy_address}
             public_address: ${_param:infra_kvm_node03_public_address}