[service-workers-tests] Increase the timeout for cache-storage tests, a=testonly (#1754)

Upstreamed from https://bugzilla.mozilla.org/show_bug.cgi?id=1153521

View on GitHub: https://github.com/w3c/web-platform-tests/pull/1754

Received on Wednesday, 15 April 2015 15:00:30 UTC