Merge branch 'feature/clean-cpu-core' into 'develop'

apps/cpu/MultiphaseDropletTest/droplet.cpp

apps/cpu/Nozzle/CMakeLists.txt

apps/cpu/Nozzle/in.nozzle

apps/cpu/Nozzle/nozzle.cpp.1

apps/cpu/Nozzle/nozzleSinglePhase.cpp

apps/cpu/NozzleMultiphase/CMakeLists.txt

apps/cpu/NozzleMultiphase/nozzleMultiPhase.cpp

apps/cpu/OrganPipe/CMakeLists.txt

apps/cpu/OrganPipe/OrganPipe.cpp

apps/cpu/OrganPipe/config.txt

apps/cpu/PlateWithPorousInlay/CMakeLists.txt

apps/cpu/PlateWithPorousInlay/plate.cpp

apps/cpu/PoiseuilleFlow/pf1.cpp

apps/cpu/PoiseuilleFlow/pf2.cpp

apps/cpu/PoiseuilleFlow/pf3.cpp

apps/cpu/PoiseuilleFlow/pf4.cpp

apps/cpu/RisingBubble2D/CMakeLists.txt

apps/cpu/RisingBubble2D/RisingBubble2D.cfg

apps/cpu/RisingBubble2D/RisingBubble2D.cpp

apps/cpu/ShotcreteJet/CMakeLists.txt