Adding test for response headers

Author: josemacassan

tests/test_response_headers.py

@@ -8,11 +8,11 @@ def client():
                                          token=os.environ['THREESCALE_PROVIDER_TOKEN'], ssl_verify=False)
 
 def test_x_served_by_ga(client):
-    response = client._rest.get(url=client.url + "/accounts.json")
+    response = client._rest.get(url=client.url + "/accounts")
     assert response.status_code == 200
     assert "X-Served-By" not in response.headers
 
 def test_x_served_by_mas(client):
-    response = client._rest.get(url=client.url + "/accounts.json")
+    response = client._rest.get(url=client.url + "/accounts")
     assert response.status_code == 200
     assert "X-Served-By" in response.headers