fix `delayed_job run` stdout logging in rails3

Also fix rails3 not logging to log/delayed_job.log

None of this affects syslog, only when using the local CanvasLogger

refs CNVS-11992

Change-Id: I508fee29316e9a16857576fe0eb542380a42caa0
Reviewed-on: https://gerrit.instructure.com/32710
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Rob Orton <rob@instructure.com>
QA-Review: August Thornton <august@instructure.com>
Product-Review: Brian Palmer <brianp@instructure.com>