Properly fetch DB credentials, compare csv header.
Properly fetch DB credentials, compare csv header.

Fetch the DB credentials from the metadata bucket. Check the csv
header for the current run against the "overall" data, emit a
warning if they differ.

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