ensure job is queued using the correct shard_id

refs DE-1120

Change-Id: Icbc9e8a30fc3b233b440ec47bd26c4a92ec797fa
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/288706
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Alex Slaughter <aslaughter@instructure.com>
QA-Review: Aaron Ogata <aogata@instructure.com>
Product-Review: Aaron Ogata <aogata@instructure.com>

config/initializers/periodic_jobs.rb

@@ -62,7 +62,10 @@ class PeriodicJobs
         priority: 40
       }
       dj_params[:run_at] = compute_run_at(jitter: jitter, local_offset: local_offset)
-      klass.delay(**dj_params).__send__(method, *args)
+
+      current_shard.activate do
+        klass.delay(**dj_params).__send__(method, *args)
+      end
     end
   end
 end