Re: [encrypted-media-tests] Fix #4031: Timestamp auth token 60 seconds in the past (#4045)

This changes fixes the observed issue according to [this comment](https://github.com/w3c/web-platform-tests/issues/4031#issuecomment-255229740).

View on GitHub: https://github.com/w3c/web-platform-tests/pull/4045#issuecomment-255828242

Received on Monday, 24 October 2016 18:41:20 UTC