alpha_f and phi_f are moved back into static constants

Core/Algorithms/src/DecoratedLayerDWBASimulation.cpp

Core/Algorithms/src/Detector.cpp

Core/Algorithms/src/DiffuseDWBASimulation.cpp

Core/Algorithms/src/Instrument.cpp

Core/Algorithms/src/MultiLayerDWBASimulation.cpp

Core/Algorithms/src/MultiLayerRoughnessDWBASimulation.cpp

Core/Algorithms/src/Simulation.cpp

Core/Tools/inc/BornAgainNamespace.h

Core/Tools/src/OutputDataReadStrategy.cpp

Tests/UnitTests/TestCore/ChiSquaredModuleTest.h

Tests/UnitTests/TestCore/InstrumentTest.h

Tests/UnitTests/TestCore/SimulationTest.h