Setup logging transport in tests

Without a transport Winston will print annoying "Attempt to write logs
with no transports" warnings all over the place.  Setup a transport in
tests that cause logging to suppress this.

test/controller/Controller.js

@@ -12,6 +12,8 @@ import {
 	addPluginConfigFields,
 } from "@clusterio/lib";
 
+import "../setup_logging.js";
+
 class MockEvent {}
 
 class MockInstanceConfig extends EventEmitter {