Record json kwarg in aiohttp request (#412)

* Record `json` kwarg in aiohttp request

Aiohttp supports `data` and `json` parameters to make a request.
Aiohttp enforces that only one is used make a request.

* Log when aiohttp stub makes request to live server

resolves: #406

* Record aiohttp `auth` request kwarg

Aiohttp request supports basic auth via the `auth` method parameter.
It is set as a request header by aiohttp ClientRequest.

vcr/stubs/aiohttp_stubs/__init__.py

@@ -3,6 +3,7 @@ from __future__ import absolute_import
 
 import asyncio
 import functools
+import logging
 import json
 
 from aiohttp import ClientResponse, streams
@@ -10,6 +11,8 @@ from yarl import URL
 
 from vcr.request import Request
 
+log = logging.getLogger(__name__)
+
 
 class MockStream(asyncio.StreamReader, streams.AsyncStreamReaderMixin):
     pass
@@ -57,10 +60,14 @@ def vcr_request(cassette, real_request):
     @functools.wraps(real_request)
     async def new_request(self, method, url, **kwargs):
         headers = kwargs.get('headers')
+        auth = kwargs.get('auth')
         headers = self._prepare_headers(headers)
-        data = kwargs.get('data')
+        data = kwargs.get('data', kwargs.get('json'))
         params = kwargs.get('params')
 
+        if auth is not None:
+            headers['AUTHORIZATION'] = auth.encode()
+
         request_url = URL(url)
         if params:
             for k, v in params.items():
@@ -91,6 +98,8 @@ def vcr_request(cassette, real_request):
             response.close()
             return response
 
+        log.info("{} not in cassette, sending to real server", vcr_request)
+
         response = await real_request(self, method, url, **kwargs)  # NOQA: E999
 
         vcr_response = {