Github user robertdale commented on the issue:
https://github.com/apache/tinkerpop/pull/766
@spmallette delete all of your images and then rebuild everything with
`docker/build.sh -d |tee /tmp/console.log` and send me that output file. I
wonder if it's choking on some python download. I've had that problem before.
I just rebuilt everything from scratch and it still works. (I think I use
master to build the image because I can override the maven url in
`.travis.install-maven.sh`)---
