New ExperimentalFit functional test on the way to minimizer refactoring

Fit/Minimizer/BasicMinimizer.cpp

Fit/Minimizer/BasicMinimizer.h

Fit/Minimizer/Configurable.cpp

Fit/Minimizer/Configurable.h

Fit/Minimizer/MinimizerFactory.cpp

Fit/Minimizer/MinimizerOption.h

Fit/Minimizer/Minuit2Minimizer.cpp

Fit/Minimizer/Minuit2Minimizer.h

Tests/Functional/Fit/CMakeLists.txt

Tests/Functional/Fit/ExperimentalFitTest.cpp

Tests/Functional/Fit/ExperimentalFitTest.h

Tests/Functional/Fit/StandardFitsFactory.cpp

Tests/UnitTests/Fit/CMakeLists.txt