Test Node v6 debugging support

[weinand]

Test for #6029:

• Windows - @kieferrm
• OS X - @isidorn
• Linux - @Tyriar

In node v6 the stack trace request fails for callbacks which results in an empty call stack view in the VS Code debugger. Oddly enough VS Code's code injection fixes the failing stacktrace request for yet unknown reasons.

Until VS Code 1.1.1 code injection was only working for a debug session of type 'launch'. As a consequence node v6 debugging would fail in debug sessions of type 'attach'. In the May milestone we've fixed code injection for 'attach' mode which makes node v6 debugging work in VS Code 1.2 in 'attach' mode.

Verify that you can attach to and debug an express application:

• install node v6
• from command line
  • run npm install -g express-generator
  • generate express application with express myExpressApp
  • run cd myExpressApp
  • run npm install
  • run node --debug bin\www
• open myExpressApp with VS Code and attach to the node process
• set break point to index.js:line:6
• and navigate in a web browser to 'http://localhost:3000/'

Verify that the call stack view shows the stack trace correctly.