Launching a Docker container with `--restart=always` may cause the Docker container is running after the task completes

If user launches a task (e.g., sleep 10) using the Docker containerizer to run a Docker container with `–restart=always` option (it can be enabled with `ContainerInfo.DockerInfo.parameters`), after the task completes, the Docker container will be stopped and will not be automatically started again (because Docker container's restart policy is ignored if the container is manually stopped) which is good. But when the Docker daemon is restarted (e.g., the agent host is rebooted), that Docker container will be automatically started by Docker daemon which is obviously not what we want.