move phpunit to the travis config

git-svn-id: https://svn.muze.nl/svn/ariadne-php5/trunk@6439 7882d7ee-46e0-0310-a255-a28a61b628e4
global arLoader otherwise lib/bootstrap.php can not find it

git-svn-id: https://svn.muze.nl/svn/ariadne-php5/trunk@6440 7882d7ee-46e0-0310-a255-a28a61b628e4