Fix NOCONTENT + PAYLOAD in search

[TvoroG]

Hi! Thanks for redisearch!

I'm trying to use PAYLOAD with NOCONTENT. redisearch-py returns incorrect ids and payloads in current implementation. So this test will fail:

    def testPayloadsWithNoContent(self):
        conn = self.redis()

        with conn as r:
            # Creating a client with a given index name
            client = Client('idx', port=conn.port)
            client.redis.flushdb()
            client.create_index((TextField('txt'),))

            client.add_document('doc1', payload = 'foo baz', txt = 'foo bar')
            client.add_document('doc2', payload = 'foo baz2', txt = 'foo bar')

            q = Query("foo bar").with_payloads().no_content()
            res = client.search(q)

            self.assertEqual(2, len(res.docs))

======================================================================
FAIL: testPayloadsWithNoContent (__main__.RedisSearchTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "test/test.py", line 214, in testPayloadsWithNoContent
    self.assertEqual(2, len(res.docs[0].id))
AssertionError: 2 != 4

But I'm not sure it is correct to use PAYLOAD and NOCONTENT together or no because i've found this comment in source code: # we can't have nocontent and payloads in the same response.

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❌ TvoroG
❌ gkorland
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[MeirShpilraien]

Is it possible to introduce only the actual code changes (without the spaces/new line changes)?
Also it need to be rebased from master.