rename dir -> Fit/Test/Functional

CMakeLists.txt

Fit/Test/Functional/CMakeLists.txt

Fit/Test/Functional/ClassicalTestFunctions.cpp

Fit/Test/Functional/ClassicalTestFunctions.h

Fit/Test/Functional/MinimizerTests.cpp

Fit/Test/Functional/PlanCases.cpp

Fit/Test/Functional/PlanCases.h

Fit/Test/Functional/ResidualTestPlan.cpp

Fit/Test/Functional/ResidualTestPlan.h

Fit/Test/Functional/ScalarTestPlan.cpp

Fit/Test/Functional/ScalarTestPlan.h