message: tools: use latest PX4 SITL docker image by default
diff: #!/usr/bin/env sh
  -docker run -it --rm -v $(pwd):/home/user/MAVSDK:z -e LOCAL_USER_ID=`id -u` mavsdk/mavsdk-ubuntu-18.04-px4-sitl "$@"
  +docker run -it --rm -v $(pwd):/home/user/MAVSDK:z -e LOCAL_USER_ID=`id -u` mavsdk/mavsdk-ubuntu-18.04-px4-sitl-v1.10 "$@"
  