Increase the limit on open files.
Increase the limit on open files.

This is useful for exporting data by clientId since it holds lots
of open files.

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