using a new config/periodic_jobs.yml file
test plan: edit config/periodic_jobs.yml, and verify that the overridden
jobs run at that new schedule. add an invalid override, and verify that
`script/delayed_job run` dies immediately.
closes#6875
Change-Id: Ia4611fb6f81fe82feda784300a3adf82e37a53e4
Reviewed-on: https://gerrit.instructure.com/8262
Tested-by: Hudson <hudson@instructure.com>
Reviewed-by: Cody Cutrer <cody@instructure.com>
Brian Palmer