Blacklist check for source content

Created by: Anonymous

Original issue 400 created by @ysavourel on 2014-04-01T13:24:57.000Z:

the Quality Check step has a function to check for a list of blacklisted terms on the target content.
It would be great to have the same option also on the source.

Original request: https://groups.yahoo.com/neo/groups/okapitools/conversations/messages/4193