- running at max priority significantly decreases jitter for the latency
  test, providing more consistent results
- stack size increase is required for the latency test

update msgs fields from camelCase to snake_case so rosidl_generate_interfaces() is able to generate code for ROS IDL files

Added remaining two channels of PWM_AUX_DIS disarm parameter set commands, remove trailing whitespace from pwm_params_aux.c and pwm_params_main.c, gps/params.c and added block comment headers to separate sections instead of whitespace.

 - fixes #10033

 - fixes #10028

Also cleanup other RC unit tests

- Telemetry is only enabled on omnibus, since on Pixhawk it seems we cannot
  write to the RC UART due to how the board is wired
- For the Telemetry the UART needs to be opened RW

0 is a valid file descriptor, init (all) to -1 instead

0 is a valid file descriptor

These need to be set to -1.

forwarded

Signed-off-by: Roman <bapstroman@gmail.com>

To avoid that multiple SITL instances have the same UUID we add the
mavlink system ID to the UUID which is sent via mavlink.

This should resolve the case where multiple vehicles show up with the
same UUID in simulation.

Note that the UUID show in `ver` will still be the same for all
instances.