e2e: only run on Go 1.7+
x/time/rate requires the standard library context. We only run these
tests on Travis using Go 1.8.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
+// NOTE(cbro): x/time/rate requires standard library context.
+//+build go1.7
+
// Package e2e contains end-to-end tests for Go programs running on Google Cloud Platform.
// See README.md for details on running the tests.
package e2e
