Fix YAML, end of files and trailing whitespaces

src/tests/sensors/test-bmx160.cpp

src/tests/sensors/test-l3gd20-fifo.cpp

src/tests/sensors/test-l3gd20.cpp

src/tests/sensors/test-lis3dsh.cpp

src/tests/sensors/test-max6675.cpp

src/tests/sensors/test-mpu9250.cpp

src/tests/sensors/test-ms5803.cpp

src/tests/test-eventinjector.cpp

src/tests/test-interrupt.cpp

src/tests/test-pinobserver.cpp

src/tests/test-sensormanager.cpp

src/tests/test-taskscheduler.cpp

src/tests/test-timestamp-timer.cpp