shell function to cleanup beaker docker containers

docker_cleanup_beaker.sh

# clean up all beaker containers and images
# useful when using BEAKER_destroy=no
function docker-cleanup-beaker() {
    while read i; do
        X=($i)
        echo -n "Cleaning up ${X[2]}: stopping container"
        docker stop "${X[0]}" >/dev/null
        echo -n ", removing container"
        docker rm "${X[0]}" >/dev/null
        echo -n ", removing images"
        docker image rm "${X[1]}" >/dev/null
        echo "."
    done < <(docker ps -a --filter 'name=beaker-' --format '{{.ID}} {{.Image}} {{.Names}}')
}