New 3-domain functional test for MonteCarlo integration

Core/StandardSamples/CylindersBuilder.cpp

Core/StandardSamples/CylindersBuilder.h

Core/StandardSamples/FunctionalTestRegistry.cpp

Core/StandardSamples/SampleBuilderFactory.cpp

Core/StandardSamples/SimulationRegistry.cpp

Core/StandardSamples/StandardSimulations.cpp

Core/StandardSamples/StandardSimulations.h

GUI/coregui/Models/DomainSimulationBuilder.cpp

GUI/coregui/Models/DomainSimulationBuilder.h

GUI/coregui/Models/GUIExamplesFactory.cpp

GUI/coregui/Models/GUIObjectBuilder.cpp

GUI/coregui/Models/GUIObjectBuilder.h

GUI/coregui/Models/SimulationOptionsItem.cpp

GUI/coregui/Models/SimulationOptionsItem.h

GUI/coregui/utils/GUIFunctionalTest.cpp

Tests/FunctionalTests/TestCore/CMakeLists.txt

Tests/FunctionalTests/TestGUI/CMakeLists.txt

Tests/FunctionalTests/TestPyCore/CMakeLists.txt

...ferenceData/BornAgain/ref_LargeCylindersMonteCarlo.int.gz