Less verbose logging when result from Steering playout endpoint cannot be parsed

Currently the Steering playout endpoint returns Error 500. Deal with that more nicely.

changed milestone to %1.0-alpha2 — Precise Pheasant

added P3 label

assigned to @david

marked this issue as related to steering#141 (closed)

added 1 deleted label

added To Do label

added Doing label and removed To Do label

closed

removed Doing label