Add support of OSSysLogHandler logging handler

Change-Id: If7eb42aa4badf18b3910187bc791109d93834cc8
diff --git a/metadata/service/compute/single.yml b/metadata/service/compute/single.yml
index 1884bbd..2c6f177 100644
--- a/metadata/service/compute/single.yml
+++ b/metadata/service/compute/single.yml
@@ -6,6 +6,7 @@
   _param:
     openstack_log_appender: false
     openstack_fluentd_handler_enabled: false
+    openstack_ossyslog_handler_enabled: false
   neutron:
     compute:
       enabled: true
@@ -39,3 +40,5 @@
             enabled: true
           fluentd:
             enabled: ${_param:openstack_fluentd_handler_enabled}
+          ossyslog:
+            enabled: ${_param:openstack_ossyslog_handler_enabled}