Fix/improve tests

[sliekens]

There are a good number of integration tests that enumerate the entire API like a real app would. These kind of tests are always flaky, so don't be surprised by the fact that they are failing.

The biggest reason why tests are failing right now is because the API is now throttled. Running all integration tests generates more GETs than the API "wants to" handle.

Another reason for failures is that some v1 APIs like /v1/event_names.json have been turned off completely.