Fixes bug 958558 - update releases_raw to populate update_channel
* add_new_releases.sql changes
* change ftpscraper test to only use lowercase update_channels
Migration for bug 958558
Merge pull request #1780 from selenamarie/bug957329-proc-update-for-buildtype-updatechannel

bug 958558 - add_new_releases.sql changes
fixes bug 932944 - Add processed_crash keys to the API whitelist, r=adrian