Fix default vm images

Change-Id: I34bc0fb1278f9e33209c90789b62f0e23b9a322e
Prod-related: PROD-30962 (PROD:30962)
(cherry picked from commit 6a1a7e683bb48f82a0be8694dd37c98a9baad79b)
diff --git a/salt/control/cluster/openstack_control_cluster.yml b/salt/control/cluster/openstack_control_cluster.yml
index 367041a..8ed8a5e 100644
--- a/salt/control/cluster/openstack_control_cluster.yml
+++ b/salt/control/cluster/openstack_control_cluster.yml
@@ -1,6 +1,6 @@
 parameters:
   _param:
-    openstack_control_backend_image: ${_param:salt_control_trusty_image_backend}
+    openstack_control_backend_image: ${_param:salt_control_xenial_image_backend}
     salt_control_cluster_node_cloud_init_openstack_control:
       user_data:
         write_files:
@@ -25,21 +25,21 @@
             ctl01:
               name: ${_param:openstack_control_node01_hostname}
               provider: ${_param:infra_kvm_node01_hostname}.${_param:cluster_domain}
-              image: ${_param:salt_control_trusty_image}
+              image: ${_param:salt_control_xenial_image}
               backend: ${_param:openstack_control_backend_image}
               size: openstack.control
               cloud_init: ${_param:salt_control_cluster_node_cloud_init_openstack_control}
             ctl02:
               name: ${_param:openstack_control_node02_hostname}
               provider: ${_param:infra_kvm_node02_hostname}.${_param:cluster_domain}
-              image: ${_param:salt_control_trusty_image}
+              image: ${_param:salt_control_xenial_image}
               backend: ${_param:openstack_control_backend_image}
               size: openstack.control
               cloud_init: ${_param:salt_control_cluster_node_cloud_init_openstack_control}
             ctl03:
               name: ${_param:openstack_control_node03_hostname}
               provider: ${_param:infra_kvm_node03_hostname}.${_param:cluster_domain}
-              image: ${_param:salt_control_trusty_image}
+              image: ${_param:salt_control_xenial_image}
               backend: ${_param:openstack_control_backend_image}
               size: openstack.control
               cloud_init: ${_param:salt_control_cluster_node_cloud_init_openstack_control}