test_general is not adjusted to changes in start.hh

test_general is not adjusted to changes in start.hh. Please check all tests, tutorials and dumux-lecture programs, too.

Scanning dependencies of target test_general
[  1%] Building CXX object test/common/generalproblem/CMakeFiles/test_general.dir/test_generalproblem2p.cc.o
/home/gruenich/dune/complete/dumux/test/common/generalproblem/test_generalproblem2p.cc:54:26: error: no member named 'readOptions_' in namespace 'Dumux'
    std::string s(Dumux::readOptions_(argc, argv, paramTree));
                  ~~~~~~~^
1 error generated.