Fix http-e2e for node 8.4.0 (#541)
Fix http-e2e for node 8.4.0 (#541)

This change removes failing http2 tests introduced in node v8.4.0 from our CI. There is no need to run https/http2 tests on every PR.

PR-URL: https://github.com/GoogleCloudPlatform/cloud-trace-nodejs/pull/541
matthewloring/cloud-trace-nodejs,googleapis/cloud-trace-nodejs,googleapis/cloud-trace-nodejs,googleapis/cloud-trace-nodejs,matthewloring/cloud-trace-nodejs,matthewloring/cloud-trace-nodejs,googleapis/cloud-trace-nodejs