Merge pull request #2694 from endJunction/PassXsToBCs

ProcessLib/BoundaryCondition/BoundaryCondition.h

ProcessLib/BoundaryCondition/BoundaryConditionCollection.cpp

ProcessLib/BoundaryCondition/BoundaryConditionCollection.h

...oundaryCondition/ConstraintDirichletBoundaryCondition.cpp

.../BoundaryCondition/ConstraintDirichletBoundaryCondition.h

...tion/ConstraintDirichletBoundaryConditionLocalAssembler.h

.../BoundaryCondition/GenericNaturalBoundaryCondition-impl.h

...ssLib/BoundaryCondition/GenericNaturalBoundaryCondition.h

...Condition/GenericNaturalBoundaryConditionLocalAssembler.h

...vectiveFreeComponentFlowBoundaryConditionLocalAssembler.h

...oundaryCondition/NeumannBoundaryConditionLocalAssembler.h

.../BoundaryCondition/NormalTractionBoundaryCondition-impl.h

...ssLib/BoundaryCondition/NormalTractionBoundaryCondition.h

...Condition/NormalTractionBoundaryConditionLocalAssembler.h

...sLib/BoundaryCondition/Python/PythonBoundaryCondition.cpp

...essLib/BoundaryCondition/Python/PythonBoundaryCondition.h

...yCondition/Python/PythonBoundaryConditionLocalAssembler.h

.../BoundaryCondition/RobinBoundaryConditionLocalAssembler.h

...VariableDependentNeumannBoundaryConditionLocalAssembler.h

ProcessLib/ComponentTransport/ComponentTransportProcess.cpp