topic.exists method does not resolve the promise but is pending indefinitely

[hansman]

Running @google-cloud/pubsub@0.7.1, the topic.exists method does not resolve the promise but is pending indefinitely. This is not the case in @google-cloud/pubsub@0.6.2.

Environment details

• OS:
• Node.js version: v5.12.0
• npm version: 4.0.3
• @google-cloud/pubsub@0.7.1

Steps to reproduce

pubsubClient.topic('test').exists()
Promise { <pending> }
> pubsubClient.topic('test').exists().then(console.log)
Promise { <pending> }

[stephenplusplus]

This is likely a duplicate of #1955. Please follow along there. Thank you and sorry for the trouble.