IssueTracker

I noticed that exceptions logged by our apps were not showing up in Stackdriver error reporting. I've been able to narrow it down  using the `gcloud logging` utility. This will not be picked up:

```
gcloud beta logging write --payload-type=json test-errors-log '{
  "message": "Error: New Error.\n    at process._tickCallback (internal/process/next_tick.js:68:7)",
  "serviceContext": {
    "service": "test-service",
    "version": "latest"
  }
}'
```

Whereas if I change `process._tickCallback` (e.g. add an s to process), add another line, the error is reported. Changing the location (inside the parens) does not affect this. I would venture that there is some kind of filter for this specific function, as it's internal to node? Unfortunately, we see it often at the bottom of the stack if async code fails somehow.