Make xbot2 config file variable.

[JakobThumm]

Currently, the xbot2 config file is hard-coded in

concert_description/concert_gazebo/launch/modular.launch

Line 91 in a1d092b

args="--hw sim --simtime --config $(find concert_xbot2)/modular.yaml"/>

.
We would like to use a custom config file that is not part of the ADVRHumanoids/concert_description repo without changing anything in ADVRHumanoids/concert_description.

[EdoardoRomiti]

Fixed in commit 9222e07.
Now the xbot2 config file can be passed to xbot2 as an arg of the launch file, for example :

mon launch concert_gazebo concert.launch xbot2_config:=~/concert_ws/src/concert_config/ModularBot.yaml