Regression test suite for automated testing

[bkowshik]

Per http://machinelearningmastery.com/deploy-machine-learning-model-to-production/

Develop Automated Tests For Your Model

Write regression tests for your model.

• Collect or contribute a small sample of data on which to make predictions.
• Use the production algorithm code and configuration to make predictions.
• Confirm the results are expected in the test.

We could start with a 2x manually verified dump of 100 changesets that contains:

• 50 changesets that are good, and
• 50 changesets that are problematic

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cc: @anandthakker @geohacker @batpad

[bkowshik]

Todo

• [x] Add following changesets to initial regression test list.

Changesets

• https://osmcha.mapbox.com/48574952/
• https://osmcha.mapbox.com/46978170/
• https://osmcha.mapbox.com/48930799/