Enable multiple workers for alarm-gen

Change-Id: I31464193406b3f1e12c3a75e24b5557f9c755564
Closes-Bug: PROD-16431
diff --git a/metadata/service/control/single.yml b/metadata/service/control/single.yml
index 2f4ee9d..ae20c5e 100644
--- a/metadata/service/control/single.yml
+++ b/metadata/service/control/single.yml
@@ -97,6 +97,9 @@
         password: '${_param:keystone_admin_password}'
         token: '${_param:keystone_service_token}'
         tenant: admin
+      alarm_gen:
+        workers: 1
+        port_prefix: 59
     database:
       version: ${_param:opencontrail_version}
       cassandra: