Update tinderbox scraper to use the long term mozilla-inbound server

[whimboo]

With the fix in bug 765258 we got a long term archive for tinderbox builds. Our scraper should make use of it.

The location is:
http://inbound-archive.pub.build.mozilla.org/pub/mozilla.org/firefox/tinderbox-builds/

We might want to use it as a fallback for ftp.mozilla.org.

[whimboo]

Looks like that this is also a feature requested for mozregression. We might want to wait if work is getting done there, which we can then copy. See https://bugzilla.mozilla.org/show_bug.cgi?id=935183

[kossy]

The bug at https://bugzilla.mozilla.org/show_bug.cgi?id=935183 has been solved so we should be able to copy it if still needed.

[whimboo]

Sounds like a good idea. Maybe we should completely switch over to the long-term archive for tinderbox builds? Or how often are those synced? It might be good to compare the latest builds on both locations, and check if the long-term archive also contains the most recent one once available on ftp.mozilla.org. If that is not the case we might still want to check ftp.mozilla.org first, and use the long-term as fallback.

[whimboo]

Given that we moved to S3 for builds the host http://inbound-archive.pub.build.mozilla.org/ no longer exists. What we would have to do is to get issue #365 finished.