Test Gravatar API Responses

[andrewdmontgomery]

Let's create a new test target that will test the Gravatar API responses to ensure that the Gravatar API responses are what the SDK expects.

[pinarol]

This looks like a relatively old issue, I am wondering about the context. We generate the stubs for Gravatar API responses from the specs so not sure what to test. Was this maybe to check if backend response matched the specs? And in that case, I would expect the tests to be on the server side.