Add data upload source configuration

[dschristianson]

Add configurable data upload source.

PR Self Evaluation

• [x] I have reviewed my code to check that it contains no sensitive information. ~- [ ] I have commented my code, particularly in hard-to-understand areas~
• [x] My changes generate no new warnings ~- [ ] I have added tests or modified existing tests that prove my fix is effective or that my feature works~
• [x] Existing unit tests pass locally with my changes

[dschristianson]

@toanngosy: note that once this PR is merged, you can grab the data upload source now from the config file for filtering uploaded files.

[dschristianson]

@yocheah: Put it in config so that Sy-Toan can access it there for the driver. I.e., it is in one place.