Add STACK_CLUSTER_NAME to cluster-dply template

This patch adds STACK_CLUSTER_NAME variable to cluster-deploy template

Change-Id: Ic03564444fbb88c5e6248360895e7c08b46335e3
diff --git a/jenkins/client/job/deploy/lab/deploy.yml b/jenkins/client/job/deploy/lab/deploy.yml
index 9a04876..76a077d 100644
--- a/jenkins/client/job/deploy/lab/deploy.yml
+++ b/jenkins/client/job/deploy/lab/deploy.yml
@@ -55,6 +55,10 @@
               STACK_COMPUTE_COUNT:
                 type: string
                 default: '2'
+              STACK_CLUSTER_NAME:
+                type: string
+                default: ""
+                description: "Cluster name to use from reclass"
 
               STACK_TEMPLATE:
                 type: string