InterferenceFunction2DLattice: retain only c'tor with Lattice2D argument

Core/Export/SampleToPython.cpp

.../ex03_InterferenceFunctions/CosineRipplesAtRectLattice.py

...simulation/ex03_InterferenceFunctions/TriangularRipple.py

Sample/Aggregate/InterferenceFunction2DLattice.cpp

Sample/Aggregate/InterferenceFunction2DLattice.h

Tests/Performance/Core/ThreadingComponents.cpp

Tests/UnitTests/Core/Sample/MultilayerAveragingTest.cpp

auto/Wrap/doxygenSample.i

auto/Wrap/libBornAgainSample.py

auto/Wrap/libBornAgainSample_wrap.cpp