Patch new cloud-init bridge configuration issue

Change-Id: Ie6673a30ce751aa4a070d6c0c7612f7bf0f4dd8c
diff --git a/classes/cluster/sl_os_contrail/openstack/compute.yml b/classes/cluster/sl_os_contrail/openstack/compute.yml
index 9baddb6..9535c85 100755
--- a/classes/cluster/sl_os_contrail/openstack/compute.yml
+++ b/classes/cluster/sl_os_contrail/openstack/compute.yml
@@ -25,6 +25,9 @@
     linux_system_codename: xenial
   linux:
     network:
+      concat_iface_files:
+      - src: '/etc/network/interfaces.d/50-cloud-init.cfg'
+        dst: '/etc/network/interfaces'
       interface:
         ens4:
           enabled: true