Feature/issue 3

[torimcd]

Github Issue: #3

Summarize the ticket here

Support scrambling SWOT data values during database loading to support public beta testing without exposing real measurements before public release.

Summarize the work you did

Added configuration argument to obscure data, modified read_shapefile function to implement scaling by a random integer on appropriate data columns, added new unit test.
Also made minor modifications to API data access module and testing fixtures to have unit tests work on both API and DB after merging repos so all unit tests pass.

Summarize the testing and verification you've done. This includes unit tests or testing with specific data

Added unit test for data scrambling, modified dynamodb fixtures to support both API and DB modules in combined repository. All unit tests pass.

Explain how this change was integration tested. Provide screenshots or logs if appropriate. An example of this would be a local Harmony deployment.

Linted
Updated unit tests
Updated changelog
Integration testing

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[torimcd]

@frankinspace please review