Currently the `connection-model` ssh tunnel isn't going fully tested because it requires a jumpbox to be configured: https://github.com/mongodb-js/connection-model/blob/master/test/ssh-tunnel.test.js#L371

Currently our ssh jump box used to run these tests has been deleted. We should make a new one and add the configuration to the travis tests to make sure we're fully testing the feature. Also adding it to the docs so that we can have it in our environment when testing locally will be good: https://github.com/10gen/compass-internal-docs/blob/master/testing/testing-ssh.md