Nova: Use ssh transport for Ubuntu

Currently integration jobs in Ubuntu are broken because of an issue
with enabling libvirtd socket service.

The issue is caused by the policy in Ubuntu packaging that services
like libvirt or nova-compute are enabled by default.

Until we come up with the solution to workaround the issue, this change
switches migration transport from tcp to ssh.

Change-Id: I3b1839565f1f0ad80a9eb472d1040803ec574815
(cherry picked from commit 58a60f213e)

manifests/nova.pp

@@ -167,6 +167,18 @@ class openstack_integration::nova (
     instance_usage_audit_period => 'hour',
   }
 
+  # NOTE(tkajinam): In Ubuntu, libvirtd-tcp.socket fails to start because of
+  #                 libvirtd.service running, though we stop the service in
+  #                 puppet-nova. Until we fix the failure, use ssh transport
+  #                 which does not require socket services.
+  $migration_transport = $::osfamily ? {
+    'Debian' => 'ssh',
+    default  => 'tcp'
+  }
+  class { 'nova::migration::libvirt':
+    transport => $migration_transport
+  }
+
   $images_type = $libvirt_rbd ? {
     true  => 'rbd',
     false => $::os_service_default
@@ -174,7 +186,6 @@ class openstack_integration::nova (
   class { 'nova::compute::libvirt':
     virt_type             => $libvirt_virt_type,
     cpu_mode              => $libvirt_cpu_mode,
-    migration_support     => true,
     # virtlock and virtlog services resources are not idempotent
     # on Ubuntu, let's disable it for now.
     # https://tickets.puppetlabs.com/browse/PUP-6370