Fix bugs after renaming the directions

src/cpu/VirtualFluidsCore/Grid/Grid3D.cpp

src/cpu/VirtualFluidsCore/Grid/Grid3D.h

src/cpu/VirtualFluidsCore/LBM/CumulantK17LBMKernel.cpp

...pu/VirtualFluids_GPU/Communication/ExchangeData27Test.cpp

...U/DataStructureInitializer/GridReaderFiles/GridReader.cpp

...tructureInitializer/GridReaderGenerator/GridGenerator.cpp

src/gpu/VirtualFluids_GPU/FindQ/FindQ.cpp

src/gpu/VirtualFluids_GPU/GPU/AdvectionDiffusion27chim.cu

src/gpu/VirtualFluids_GPU/GPU/AdvectionDiffusionBCs27.cu

src/gpu/VirtualFluids_GPU/GPU/CP27.cu

src/gpu/VirtualFluids_GPU/GPU/Calc2ndMoments27.cu

src/gpu/VirtualFluids_GPU/GPU/CalcConc27.cu

src/gpu/VirtualFluids_GPU/GPU/CalcMac27.cu

src/gpu/VirtualFluids_GPU/GPU/Cascade27.cu

src/gpu/VirtualFluids_GPU/GPU/Cumulant27.cu

src/gpu/VirtualFluids_GPU/GPU/Cumulant27chim.cu

src/gpu/VirtualFluids_GPU/GPU/Cumulant_F3_27.cu

src/gpu/VirtualFluids_GPU/GPU/DragLift27.cu

src/gpu/VirtualFluids_GPU/GPU/ExchangeData27.cu

src/gpu/VirtualFluids_GPU/GPU/Init27.cu