Test: "Just my Code" feature of node and node2

[weinand]

Test for #3215:

• Windows - @ramya-rao-a
• OS X - @chrmarti
• Linux - @Tyriar

Complexity: 3

The VS Code node debuggers (Node Debug and Node Debug 2) now support a feature similar to Visual Studio's "Just my Code" feature. With this you can easily skip over "uninteresting" code when debugging.
The feature is enabled by specifying the skipped code through a set of glob patterns for a skipFiles attribute. Positive patterns (e.g. foo/**/*.js) add to the set of skipped files, while negative patterns (e.g. !foo/**/bar.js) subtract from that set. In the following "skipped code" means code that is covered by the skipFiles glob patterns.

If skipped code is enabled, debugging is affected in the following way:

• if you step into skipped code, VS Code will continue to 'step in' until it reaches code that is not skipped.
• If you have a breakpoint in skipped code, the debugger will still break at that breakpoint and you can step manually inside the skipped code until you 'continue' or step out of it.
• You won't break on caught exceptions thrown in skipped code.

Verify that:

• the feature works as described both for debug type nodeand node2

[roblourens]

Note that ! patterns aren't implemented in node-debug2. It should print a warning message if you have any present in your launch config.