Assumptions/Interpretation of task (where specifications were scarce):
- Species 'year' is only asking for the 'year' key, not 'bracketYear' too
- The specified json values should be string if surrounded by "", and numbers if only '<>' surrounds it (only /diag/'s uptime and /country/'s []speciesKey are numbers)
- This API accepts any two-letter /country/{:countryidentifier}: therefore it should return 502 if 404 is returned by the restcountries API
