Bug 1035222 - Use correct Thunderbird repo name to fix ingestion

The repository name must match that used by buildbot in builds-4hr,
builds-running, builds-pending, clobberer & self-serve otherwise
data ingestion and many links in the UI will break.
The only service that requires a different repo name is treestatus,
which will require a treeherder-ui change after this lands.
Merge pull request #218 from mozilla/fix-thunderbird-ingestion

Bug 1035222 - Use correct Thunderbird repo name to fix ingestion