Ability to set lock_path

PROD-34037

Change-Id: Ia1f0bb8a8937e85062fcb2236ef0cb7af158ca58
diff --git a/metadata/service/compute/cluster.yml b/metadata/service/compute/cluster.yml
index 2f081d5..b9bdfd3 100644
--- a/metadata/service/compute/cluster.yml
+++ b/metadata/service/compute/cluster.yml
@@ -14,6 +14,8 @@
       enabled: true
       heal_instance_info_cache_interval: 60
       vncproxy_url: http://${_param:cluster_vip_address}:6080
+      concurrency:
+        lock_path: '/var/lib/nova/tmp'
       bind:
         vnc_address: ${_param:cluster_local_address}
         vnc_port: 6080