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.

The current commit hash points to a deleted branch.

This allows to load mixers with more inputs.

This capability was removed unintentionally by previous changes.
Requires ecl version with updated declination accessor function