Merge pull request #27831 from y-yagi/make_backburner_integration_test_to_work

make backburner integration test to work

activejob/test/support/integration/adapters/backburner.rb

@@ -23,12 +23,12 @@ def stop_workers
   end
 
   def tube
-    @tube ||= Beaneater::Tube.new(Backburner::Worker.connection, "backburner.worker.queue.integration-tests") # backburner dasherizes the queue name
+    @tube ||= Beaneater::Tube.new(@worker.connection, "backburner.worker.queue.integration-tests") # backburner dasherizes the queue name
   end
 
   def can_run?
     begin
-      Backburner::Worker.connection.send :connect!
+      @worker = Backburner::Worker.new
     rescue
       return false
     end