Resolve "Run automated tests in pipeline"

Closes #48 (closed)

The new Pipeline stage uses the tests that i have written while developing the first version of user-panel. It uses chromedriver and a javascript testing framework which is called nightwatch

I had to remove all tests that assign roles and applications as the role and application selection on the admin page has been changed significantly.

After this MR is merged and we have a CI running we should think about making the tests more readable and easier to extend. I will look into how and if the used testing framework nightwatch can support gherkin syntax.