fixes #8588 - make repo indexing idempotent
Merge pull request #4851 from stbenjam/8588

fixes #8588 - make repo indexing idempotent
fixes #7668 - host errata mail notification
fixes #7666 - sync errata mail notification
fixes #7667 - promotion errata mail notification
Merge pull request #4780 from stbenjam/7668

fixes #7666, #7667, #7668 - errata mail notifications
fixes #8040 - Product content changes are updated in UI, BZ1112747