itest-pull.sh timeout flake while pulling from http

[jlebon]

I've seen a few times the following flake from itest-pull.sh:

+ ostree --repo=bare-repo pull --disable-static-deltas origin fedora/27/x86_64/atomic-host
error: [28] Timeout was reached

My theory is that the python server might start flaking if load is high from the other parallel tests happening, though I haven't looked further into it.

[cgwalters]

Might be another variant of e89d37e except with curl_easy_setopt (req->easy, CURLOPT_CONNECTTIMEOUT, 30L);

[cgwalters]

Need to figure out if we can teach libcurl to tell us the reason why we timed out.