Rename www.example.com -> test.example.com for push resource
so that it could be used for integration test. We have test certs valid
for test.example.com only. This clean up will help set up for server
push cancellation integration tests which need both setting up for certs
nd pushed resource.

Merge internal change: 147400096

BUG=232040

Review-Url: https://codereview.chromium.org/2692943003
Cr-Commit-Position: refs/heads/master@{#450182}
8 files changed