use kwarg (required for Session)

 * requests.api.put has data as a kwarg with default value None so
   this was why requests.get(url, data) worked

conftrak/client/utils.py

@@ -42,7 +42,7 @@ def _get(url, params):
         Results of the query
 
     """
-    r = session.get(url, ujson.dumps(params))
+    r = session.get(url, params=ujson.dumps(params))
     if r.status_code == 500 and "found" in r.reason:
         raise ConfTrakNotFoundException(r.reason)
     r.raise_for_status()