lava-dispatcher: tweaks for supporting docker test action
To allow the lava-dispatcher to run in a docker container and the action it is running use a container we need to expose a few things to allow the secondary container to be spun up correctly.
- Expose /var/run/docker.sock to the lava-dispatcher container so containers spun up inside it become sibilings.
- For udev and things like pyudev to see the current device database we need to expose /run/udev
Signed-off-by: Kumar Gala email@example.com