set default heat stack name

Change-Id: I2054b05555a86fdc9f980b0ecb294c054e0ab8a9
diff --git a/mk-k8s-mcp-oc-deploy-pipeline.groovy b/mk-k8s-mcp-oc-deploy-pipeline.groovy
index 109b17b..9640594 100644
--- a/mk-k8s-mcp-oc-deploy-pipeline.groovy
+++ b/mk-k8s-mcp-oc-deploy-pipeline.groovy
@@ -33,6 +33,10 @@
     def openstackVersion = OPENSTACK_API_CLIENT ? OPENSTACK_API_CLIENT : "liberty"
     def openstackEnv = "${env.WORKSPACE}/venv"
 
+    if (HEAT_STACK_NAME == "") {
+	HEAT_STACK_NAME = JOB_NAME + "-b" + BUILD_NUMBER
+    }
+
     stage ('Download Heat templates') {
         git.checkoutGitRepository('template', HEAT_TEMPLATE_URL, HEAT_TEMPLATE_BRANCH, HEAT_TEMPLATE_CREDENTIALS)
     }