Gcloud SDK no longer works in the latest beta

[cyph (Cyph, Inc.)]

See issue described here: https://code.google.com/p/google-cloud-sdk/issues/detail?id=1332

It works as expected with the current stable (1.12.3), but not 1.23.3-beta30.1 on OS X El Capitan.

[dsheets (David Sheets)]

Please report issues to the Docker for Mac issue tracker at https://github.com/docker/for-mac/issues.