Fixed script unit tests. Fixed generate_test_runner configuration loading

- Modified rakefile to look in correct directory for script unit tests
- Updated paths in script unit tests
- Updated 'expectdata' files to match latest version of generated code
- Fixed bug which prevented generate_test_runner from loading config from
yaml file.

test/rakefile

@@ -34,7 +34,7 @@ end
 
 desc "Test unity's helper scripts"
 task :scripts => [:prepare_for_tests] do
-  Dir['test/test_*.rb'].each do |scriptfile|
+  Dir['tests/test_*.rb'].each do |scriptfile|
     require "./"+scriptfile
   end
 end