Bug 1069493 - Stop mirroring classification comments to TBPL's DB

TBPL is going to be EOLed soon, and few people are still using it. As
such we can stop mirroring failure classification comments to
submitBuildStar.php.
Bug 1113726 - Disable b2g28_v1_3t repo
Bug 1113278 - Add the mozilla-b2g34_v2_1s repository
Bug 1069560 - Submit comments directly to Bugzilla rather than via TBPL