Update to new output path

In the new IDEA Version the default output path differs from the one before:

old: build//classes/debug new: build/intermediates/classes/debug

To get the tests running, the output path wich has to be adapted can't be changed to 'build/intermediates/test-classes', it has to be 'build/test-classes' to get this working.
Merge pull request #29 from w4beda/patch-1

Update to new output path