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

changed a comment

reverted a file back to master

    - micro-CDR in PX4/Firmware (eca3a58a36d7367d5d5ca4a6289585e13003cf51): https://github.com/eProsima/micro-CDR/commit/890b118196a253540bc175096fa53d7733005d7b
    - micro-CDR current upstream: https://github.com/eProsima/micro-CDR/commit/df48e526feca3bd140b0adf12c3c847a6d78ed79
    - Changes: https://github.com/eProsima/micro-CDR/compare/890b118196a253540bc175096fa53d7733005d7b...df48e526feca3bd140b0adf12c3c847a6d78ed79

    df48e52 2018-07-11 Luis Enrique Muñoz Martín - Removed some inline modifiers
c77a49f 2018-07-11 Luis Enrique Muñoz Martín - indent
4f659ab 2018-07-11 Luis Enrique Muñoz Martín - Removed unused images.
d3a5b4a 2018-07-11 Luis Enrique Muñoz Martín - Removed old files.