Change default parameter to 'sl-legacy'

Change-Id: I56494aee763be64cecaed19879908f525ad74908
diff --git a/jenkins/client/job/deploy/lab/mk/cloud.yml b/jenkins/client/job/deploy/lab/mk/cloud.yml
index fa13051..797f378 100644
--- a/jenkins/client/job/deploy/lab/mk/cloud.yml
+++ b/jenkins/client/job/deploy/lab/mk/cloud.yml
@@ -55,15 +55,15 @@
         job_timer: ""
       - stack_name: stacklight_k8s_calico
         stack_type: heat
-        stack_install: core,k8s,calico,stacklight
+        stack_install: core,k8s,calico,sl-legacy
         job_timer: ""
       - stack_name: stacklight_os_contrail
         stack_type: heat
-        stack_install: core,openstack,contrail,stacklight
+        stack_install: core,openstack,contrail,sl-legacy
         job_timer: ""
       - stack_name: stacklight_os_ovs
         stack_type: heat
-        stack_install: core,openstack,ovs,stacklight
+        stack_install: core,openstack,ovs,sl-legacy
         job_timer: ""
   jenkins:
     client: