Use example inputs and outputs for testing

[lhannest]

The swagger specification file can have example inputs and outputs. We could have our tests use the example inputs for general testing purposes, as well as check them against the example outputs.

One thing to keep in mind is that the example inputs should produce large (e.g., at least 100 items) outputs. But the example outputs should be very small for the sake of the UI. But we can still test that the example outputs are a subset of the actual outputs.