(TK-29) Add support for query parameters

This PR adds support for query parameters to both the Java and clojure clients.

With the Java client, setting Query Parameters works the same way it did before the port to AsyncHttpClient.

With the clojure client, query parameters are set with a new :query-params option in the options map passed to a request. Query parameters can be set either in the URL or with this new option. However, if the query parameters are set with this new option AND in the URL, all parameters set directly in the URL will be removed, and only the ones specified in the options map will be sent as parameters.
The difference came from the fact that with the Jetty Client, I was trying to mimic the old functionality as close as I could, but with the clojure client I was attempting to mimic the functionality in clj-http. I agree that this is an inconsistency, so I'll modify the Java client to show the same functionality as the clojure client.