OS news update hook fixes field_uplaod.  #1412

Several instances of field_upload were set up incorrectly.  They had empty arrays where there were no uploads.  These shouldn't have been set at all.  When the hook tried to save them, mysql said no.  I cleared out the bad data during the same update hook.

Update hook runs fine against a fresh copy of hwpi2 data.  If hwpi2dev gives trouble again, try recopying the DB to it first.  I think it has the news date field already, which is problematic.

Also note that the os_news feature needs to be reverted BEFORE this hook will run.
Merge branch 'SCHOLAR-3.x' of github.com:openscholar/openscholar into SCHOLAR-3.x
Merge branch 'SCHOLAR-3.x' of github.com:openscholar/openscholar into SCHOLAR-3.x