Update budget filter to use "payload_size" msgs.
Update budget filter to use "payload_size" msgs.

acmiyaguchi/data-pipeline,sapohl/data-pipeline,sapohl/data-pipeline,acmiyaguchi/data-pipeline,mozilla-services/data-pipeline,whd/data-pipeline,whd/data-pipeline,mozilla-services/data-pipeline,acmiyaguchi/data-pipeline,whd/data-pipeline,acmiyaguchi/data-pipeline,sapohl/data-pipeline,sapohl/data-pipeline,mozilla-services/data-pipeline,whd/data-pipeline,mozilla-services/data-pipeline