#1 Remove dependence of path of unit test source files

[Dr. Rupert Rebentisch]

The path of the project is hard coded in GlobalTestSettings. This is done to load the test xml files for testing of the peristency functionality.

This hard coding forces a change whenever the project is stored in a new place. Has not been a real problem up to now but will if other people are downloading the sources and try to run the tests.