Created Issue: Error in test output when Node.js isn't installed [591]

Make sure you don't have Node.js installed
Open the test explorer tool window
Create New Node.js console app
You'll see an error on the status bar. Open the output window and you'll see:

```
------ Load Playlist started ------
========== Load Playlist finished (0:00:00.0190787) ==========
------ Discover test started ------
Processing c:\projects\NodejsConsoleApp4\NodejsConsoleApp4\app.js
An exception occurred while test discoverer 'TestDiscoverer' was loading tests. Exception: Cannot start process because a file name has not been provided.
========== Discover test finished: 0 found (0:00:01.32759) ==========
```

We should provide a better error message in this case.