Set lock_path on compute and gateway nodes

PROD-34246

Change-Id: I3de5fffdd24ea059488d66bd7084dd5da032df88
diff --git a/metadata/service/gateway/single.yml b/metadata/service/gateway/single.yml
index 631e749..5dfa8c4 100644
--- a/metadata/service/gateway/single.yml
+++ b/metadata/service/gateway/single.yml
@@ -11,6 +11,8 @@
     gateway:
       enabled: true
       version: ${_param:neutron_version}
+      concurrency:
+        lock_path: '/var/lib/neutron/lock'
       message_queue:
         engine: rabbitmq
         host: ${_param:cluster_vip_address}