* Fixing unit tests on local box by ignoring ExampleAPI.getPiwikVersion which would fail at every new version

Note: on my box, when I run all_tests.php, I don't see the green bar at the bottom of the page anymore. It simply displays the Time and Memory delta. I didn't see any commit that coudl have broken this so I'm a bit confused as to why the green/red bar doesn't display anymore?

git-svn-id: http://dev.piwik.org/svn/trunk@2472 59fd770c-687e-43c8-a1e3-f5a4ff64c105