Unhardcode kubernetes version for k0s

Allow to pass K0S_VERSION

Related-Prod: PRODX-46480
Change-Id: Icc05e4055e4a972e328bb42b332d71de04866180
diff --git a/de/heat-templates/fragments/SrvInstancesVM.yaml b/de/heat-templates/fragments/SrvInstancesVM.yaml
index fd83b44..5a142cb 100644
--- a/de/heat-templates/fragments/SrvInstancesVM.yaml
+++ b/de/heat-templates/fragments/SrvInstancesVM.yaml
@@ -87,6 +87,9 @@
   devops_utils_refspec:
     type: string
     default: 'master'
+  k0s_version:
+    type: string
+    default: ''
 
 resources:
 
@@ -120,6 +123,7 @@
             $secure_overlay_enabled: { get_param: secure_overlay_enabled }
             $kubectl_version: { get_param: kubectl_version }
             $devops_utils_refspec: { get_param: devops_utils_refspec }
+            $k0s_version: { get_param: k0s_version }
 
   inject_files:
     type: "OS::Heat::CloudConfig"