Firefox hourly usage plugin refinement
Firefox hourly usage plugin refinement

- use the new split object telemetry message
- add boundary checks as per https://bugzilla.mozilla.org/show_bug.cgi?id=1131822

mreid-moz/data-pipeline,nathwill/data-pipeline,kparlante/data-pipeline,nathwill/data-pipeline,nathwill/data-pipeline,mreid-moz/data-pipeline,acmiyaguchi/data-pipeline,acmiyaguchi/data-pipeline,whd/data-pipeline,whd/data-pipeline,nathwill/data-pipeline,kparlante/data-pipeline,whd/data-pipeline,acmiyaguchi/data-pipeline,mreid-moz/data-pipeline,whd/data-pipeline,sapohl/data-pipeline,sapohl/data-pipeline,sapohl/data-pipeline,mozilla-services/data-pipeline,mozilla-services/data-pipeline,kparlante/data-pipeline,kparlante/data-pipeline,mozilla-services/data-pipeline,mozilla-services/data-pipeline,sapohl/data-pipeline,acmiyaguchi/data-pipeline