fix(app): test setup in default configuration

Since modules selected during the scaffolding process are now automatically
added to app dependencies, test would fail because karma didn't have an option
to load additional modules. With generator-karma 0.6 I added an option to load
additional bower components which this generator now makes use of when calling
`hookFor`.

Couldn't extensively test this, because coffee shop Wifi sucks. Could someone else give it a try?

Side note: We should add a data structure to map selected modules to bower components and files to include to get rid of those if-chains, especially considering that there will be even more modules with AngularJS 1.2.