Splitted large groups of tests out of testsimplifytokens.cpp and testtokenize.cpp
Avoid loading the same .cfg file 30 times in testsimplifytokens.cpp
Added test file for garbage code:
- cppcheck should be run entirely on garbage code to ensure that no check crashs/hangs on it (TODO).
- All garbage code tests should be moved here (TODO, so far only those from testtokenize.cpp were moved)