Add nested tuple tests

This code creates this table:

CREATE TABLE mytable (k int PRIMARY KEY, v_1 tuple<int>,v_2 tuple<tuple<int>>,v_3 tuple<tuple<tuple<int>>>,v_128 tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<tuple<int>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>)

The first insert of `(303,)` is fine. The second insert of `((303,),)` produces this error:

```
Traceback (most recent call last):
  File "/Users/joaquin/repos/python-driver/tests/integration/standard/test_types.py", line 583, in test_nested_tuples
    s.execute("INSERT INTO mytable (k, v_%s) VALUES (%s, %s)", (i, i, created_tuple))
  File "/Users/joaquin/repos/python-driver/cassandra/cluster.py", line 1233, in execute
    result = future.result(timeout)
  File "/Users/joaquin/repos/python-driver/cassandra/cluster.py", line 2674, in result
    raise self._final_exception
InvalidRequest: code=2200 [Invalid query] message="Invalid tuple literal for v_2: component 0 is not of type tuple<int>"
```