mavsdk_tests: disable mag stuck test
mavsdk_tests: disable mag stuck test

The estimator sometimes diverges in vz after landing which makes the
test fail. This needs to be dealt with first before we can enable the
test again.

acfloria/Firmware,acfloria/Firmware,acfloria/Firmware,acfloria/Firmware,acfloria/Firmware,acfloria/Firmware,acfloria/Firmware