Small changes to the test rakefile. This rakefile still is not completely satisfactory, as I cannot use it to load all libs but only run on test method, which is often important when trying to track down a bug that only occurs when multiple files are loaded.

git-svn-id: https://reductivelabs.com/svn/puppet/trunk@1924 980ebf18-57e1-0310-9a29-db15c13687c0