Create test suite for browser only tests

[kood1]

We need to create tests which only executes on a real browser instead of HtmlUnit only. For instance, we need to create tests for ExtWebDriver interface which deals with browser related activities such as back, forward, dialogs, popups. This suite should also include tests around mouse events such as drag and drop which doesn't run on HtmlUnit.

This suite needs to run against Sauce Labs instead of Travis CI.