Fix process logs not returning

The API endpoint listening for a dump of process logs was not returning logs properly for two reasons:
1. The `id` field was being appended to each log. This had been moved to the `handleLog` function of the `LogHandler`.
2. The slice needed to grab logs from the end, so the `limit` was made negative on the `.slice()`.

lib/modules/process_logs_api/index.js

@@ -28,7 +28,7 @@ class ProcessLogsApi {
       (req, res) => {
         let limit = parseInt(req.query.limit, 10);
         if (!Number.isInteger(limit)) limit = 0;
-        const result = this.logHandler.logs.map((log, id) => Object.assign(log, {id})).slice(limit);
+        const result = this.logHandler.logs.slice(limit * -1);
         res.send(JSON.stringify(result));
       }
     );