[autotests] qtestlib selftests contain hard-coded paths/version numbers in reference data

The expected data files in qtbase/tests/auto/selftests contain hard-coded paths (e.g. /home/fenglich) and hard-coded version numbers (e.g. 4.3.0 and 4.5.0). these may be at elast partly responsible for the selftest failures reported in QTBUG-19547.

Ideally, the expected data files would contain placeholders for the path and version number so that the data does not need to be updated every time the Qt version number is incremented.