Add basic integration test

Add basic integration test
Incorrect. "Welcome to Zeppelin" is not a link, so it can't be found by "partialLinkText". See http://docs.seleniumhq.org/docs/03_webdriver.jsp. There is no searching just by text. It means 2 things. Or it good practice to add "id" everywhere and search by it, or there is no such functionality at all. I'm about to dig into it.