Edward Hervey authored Jul 19, 2017 and Edward Hervey committed Jul 19, 2017

This was re-introduced by the following commit in gst-validate:

commit c8cd695bb9c87683a8b7c6833edf948fa8b92bc4
Author: Sebastian Dröge <sebastian@centricular.com>
Date:   Fri Jul 14 10:36:49 2017 +0300

    validate: Un-blacklist scrub_forward_seeking.op2b-mpeg2-wave_hd_mxf