1. Remove ansible-blocking-io.py workaround. It's not required.
2. Variable should be PROD_REPO_URL, not STAGE_REPO_URL in
ostree-raw-image.sh
3. Use --reboot in rpm-ostree install to reboot VM instead of
a reboot ansible task
4. Wait until config file serviceinfo_api_server.yml exists, to
avoid file not available to use flaky issue