Add mitaka models with trusty

Mitaka models with trusty for maintenance team purposes.
Change-Id: I8eac7ac18d7f7632bdfb36c550eb1ee4c1b4cc80
diff --git a/classes/cluster/virtual-mcp-mitaka-dvr/openstack/compute.yml b/classes/cluster/virtual-mcp-mitaka-dvr/openstack/compute.yml
index 9e41e85..d000096 100644
--- a/classes/cluster/virtual-mcp-mitaka-dvr/openstack/compute.yml
+++ b/classes/cluster/virtual-mcp-mitaka-dvr/openstack/compute.yml
@@ -1,5 +1,5 @@
 classes:
-- system.linux.system.repo.mcp.openstack
+- system.linux.system.repo.mcp.apt_mirantis.openstack
 - system.linux.system.repo.mcp.extra
 - system.linux.system.repo.saltstack.xenial
 - system.linux.network.hosts
@@ -15,7 +15,6 @@
     tenant_interface: ens5
     external_interface: ens6
     interface_mtu: 1500
-    linux_system_codename: xenial
   neutron:
     compute:
       notification: