Enable autorestart on svc-monitor exit

Upon zookeeper restart we stop the backup services(schema/svc-monitor/device-manager etal)
and depend on supervisord to restart the services.
However contrail-svc-monitor ini template file didnt have autorestart=true set hence
the service was not restarted.

Change-Id: I7984e8e826b134740de02d3803a24dba4c7c3c89
Closes-Bug:#1630495

src/config/svc-monitor/contrail-svc-monitor.ini

@@ -2,6 +2,7 @@
 command=/usr/bin/contrail-svc-monitor --conf_file /etc/contrail/contrail-svc-monitor.conf --conf_file /etc/contrail/contrail-keystone-auth.conf
 priority=460
 autostart=true
+autorestart=true
 killasgroup=true
 stopsignal=TERM
 redirect_stderr=true