Atom feed tests fail if username contains an apostrophe

Failed build example can be seen here: https://semaphoreapp.com/gitlabhq/gitlabhq/branches/master/builds/565

The events title is built using the active support view, and ends up being html escaped. When placed in the title. And then on the tests side, because the title attribute isn't marked as xhtml or html, it ends up comparing against the text value, which includes the html escaped apostraphe.