test(): setup for integration tests (currently non-automatic, only manual-situation)

This introduces somehow integration tests with a real vertxbus, i.e. auth/login.

How to use:

1. Preparations
  1. ensure running `npm install` for the latest dependencies
  2. ensure running `grunt` for a build of the latest `temp/src/angular-vertxbus-adapter.js`
  3. ensure running `npm run-script install-it-vertx-server` to download a VertX binary (stored at `test/e2e/vertx`)

2. Run
  1. use `npm run-script start-it-vertx-server` starting a VertX instance mocking an auth manager (see `test/e2e/vertx/app/de.knallisworld~mock~1.0/app.js`)
  2. use `npm run-script start-it-web-server` starting a small web server (node-express) serving a simple AJS app stored at `test/e2e/web`