Arvados

In port-a-pipeline (https://arvados.org/projects/arvados/wiki/Port_a_Pipeline) under the section "Create Docker image with Arvados command-line tools and other tools we want" the docs suggest that the default user inside of the arvados/jobs docker container is "root", but it appears to actually be "crunch"

It appears also that sudo is not installed in the container, so I think the best work around for this is to ask `docker run` to run interactively as root instead of the default.

In other words,

$ docker run -ti arvados/jobs /bin/bash

could instead be:

$ docker run -ti -u root arvados/jobs /bin/bash