An Async REST service that takes IP addresses, checks which countries they are from and if there are any returns list
of countries from the northern hemisphere. 

* In order to get information about IP addresses API uses IP Vigilante API: https://www.ipvigilante.com/api-developer-docs/.
	
* Uses latitude value to decide if IP address comes from a country from the northern hemisphere.

* Service exposes one endpoint for a GET request
* The endpoint should accept list of IP addresses passed as request parameters
* The endpoint should accept at least 1 and maximum 5 ip addresses
* If among the passed IP addresses there are addresses from countries from the northern hemisphere, service should return these country names.
* Response contains list of unique names (no repetitions of names) sorted alphabetically

curl "https://localhost:8888/northcountries?ip=8.8.8.8&ip=8.8.0.0&ip=177.0.0.0&ip=180.0.0.0&ip=190.0.0.0"

{  
   "northcountries":[  
      "Colombia",
      "Japan",
      "United States"
   ]
}

* Internally uses Spring's `@Async` and Java's `CompletableFuture<?>`
* For N requests time taken is Max(N) Spindle time.
* For example for below scenario the Approximate response time 5 Seconds.
	* IP Call 1 Takes 2 Seconds 
	* IP Call 2 Takes 5 Seconds 
	* IP Call 3 Takes 1 Seconds 
	* IP Call 4 Takes 1 Seconds 
* This is because all for requests are made in parallel.

* The API can be tested via Swagger.
* The Test Case Coverage is About 60% With Integration Tests.
* There is more scope of Improvement/Re Factoring needed in terms of design(Also some properties should be externalised).
* Service can be started using ` java -jar target\finder-0.0.1-SNAPSHOT.jar from project root `.
* Please make sure you run ` maven clean install -DskipTests`.