Init async temp data mgr task in dataservice.

Adding async task to service manager setup in main dataservice function
to manage temporary datasets.

python/services/dataservice/dmod/dataservice/__main__.py

@@ -157,6 +157,7 @@ def main():
     # Setup other required async tasks
     service_manager.add_async_task(service_manager.manage_required_data_checks())
     service_manager.add_async_task(service_manager.manage_data_provision())
+    service_manager.add_async_task(service_manager.manage_temp_datasets())
 
     service_manager.run()