Ce 1019 exacttarget updates

I'm also not sure this test is useful as you're testing your implementation details and not that it does what is expected. I think it would be better to test if `sendNewUserData` sends the expected data to FC/ExactTarget, i.e. by mocking the client and anything else necessary, and checking that a Create is called with the expected data for a subscriber, data extension, and properties data extension (similar to what you're doing in the test for `createUserPropertiesDataExtension` by itself. That way, you're not testing if these methods (of which only `createUserPropertiesDataExtension` is tested so far) are called which doesn't really mean anything, you're instead testing that `sendNewUserData` actually sends the user data.