[TEST] adapt all test outfiles
[NOP] add to test
[INTERNAL] Refactor: Method Extraction
[FIX] check return value of window integration
[NOP] cpplint fix
[FIX] disable cppcheck for DIAScoring.cpp

- running cppcheck on DIAScoring.cpp triggers a bug in cppcheck (which
  is unrelated to the code in question)
- error message:
  [src/openms/source/ANALYSIS/OPENSWATH/DIAScoring.cpp] -> [OpenMS/DATASTRUCTURES/DPosition.h:90]: (error) Internal error.  Token::Match called with varid 0.
- add documentation what was done
[FIX] fix bug