add missing parameter block_migration
diff --git a/nova/files/liberty/nova-compute.conf.Debian b/nova/files/liberty/nova-compute.conf.Debian
index dcd7f88..bcc6307 100644
--- a/nova/files/liberty/nova-compute.conf.Debian
+++ b/nova/files/liberty/nova-compute.conf.Debian
@@ -34,12 +34,13 @@
 allow_resize_to_same_host=True
 
 {%- if compute.get('ceph', {}).ephemeral is defined %}
-live_migration_flag="VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_LIVE,VIR_MIGRATE_PERSIST_DEST,VIR_MIGRATE_TUNNELLED"
+live_migration_flag="VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_LIVE,VIR_MIGRATE_PERSIST_DEST"
+block_migration_flag="VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_LIVE,VIR_MIGRATE_PERSIST_DEST"
 {%- else %}
 live_migration_flag=VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_LIVE
+block_migration_flag=VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_LIVE
 {%- endif %}
 live_migration_retry_count=30
-
 #Neutron
 neutron_admin_username={{ compute.network.user }}
 neutron_admin_password={{ compute.network.password }}