Px4-autopilot: Failing test output is swallowed

[julianoes]

When I run make tests and some test fails, I often don't see the printfs that lead to the failure.
E.g. to see a warning I need to change:
https://github.com/PX4/Firmware/blob/d4e06e517adbe7dd84602dc7002544a0cdcc77cf/platforms/posix/cmake/sitl_tests.cmake#L141

to:

COMMAND ${CMAKE_CTEST_COMMAND} -V -T Test

Only then PX4_WARN will show up.

[julianoes]

Go away you bot.