[io0] move wavelength from SpecularSimulation to ISpecularScan ()

GUI/Model/Device/InstrumentCollection.h

GUI/Model/FromCore/GUIExamplesFactory.cpp

GUI/Model/FromCore/ItemizeSimulation.cpp

GUI/View/Project/PyImportAssistant.cpp

Sim/Export/SimulationToPython.cpp

Sim/Scan/AlphaScan.h

Sim/Scan/ISpecularScan.h

Sim/Scan/QzScan.cpp

Sim/Scan/QzScan.h

Sim/Simulation/SpecularSimulation.cpp

Sim/Simulation/SpecularSimulation.h

Tests/Functional/GUI/Check.cpp

auto/Wrap/doxygenSim.i

auto/Wrap/libBornAgainSim.py

auto/Wrap/libBornAgainSim_wrap.cpp