Comment 1 for bug 1587639

Code, PGTAP test, and release notes pushed:

http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/berick/lp1587639-vand-auth-edit-date

Unlike bug #1447746 for bib records, editor and edit_date are always updated for authority records. This is due in part to the fact that authority records don't have a source value to update (the crux of bug #1447746 -- Well, there is an authority.record_entry.source column, but it is to my knowledge unused), but also there is currently no use case for a match-only merge with authority records, unlike bib records, which use them for loading holdings. IOW, all Vandelay authority merges/imports are considered record modifications.