restore px4fmu-v2_test

Makefile

ROMFS/px4fmu_test/init.d/rc.sensors

ROMFS/px4fmu_test/init.d/rcS

Tools/check_code_style_all.sh

Tools/px_process_airframes.py

Tools/px_process_params.py

cmake/configs/nuttx_px4fmu-v2_test.cmake

src/firmware/nuttx/CMakeLists.txt

src/modules/commander/commander.cpp

...s/commander/commander_tests/state_machine_helper_test.cpp

src/modules/controllib_test/test_params.c

src/modules/mavlink/mavlink_tests/CMakeLists.txt

src/modules/mavlink/mavlink_tests/mavlink_ftp_test.cpp

src/modules/mavlink/mavlink_tests/mavlink_ftp_test.h

src/systemcmds/tests/test_params.c

src/systemcmds/tests/tests_main.c