Inference on namedtuples called with rename=True won't give all the fields

[pylint-bot]

Originally reported by: BitBucket: ceridwenv, GitHub: @ceridwen?

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Rename changes the field names but brain_stdlib doesn't handle this.

>>> from astroid import test_utils
>>> result = test_utils.extract_node('''
... from collections import namedtuple
... namedtuple('a', 'a a a', rename=True)(1, 2, 3) #@
... ''')
>>> result
<Call l.3 at 0x7fa004acd6a0>
>>> next(result.infer())
<Instance of .a at 0x140325316097248>
>>> i = next(result.infer())
>>> i.instance_attrs
{'a': [<EmptyNode.a l.3 at 0x7fa004ae3b70>]}
>>> from collections import namedtuple
>>> n = namedtuple('a', 'a a a', rename=True)
>>> dir(n)
['_1', '_2', '__add__', '__class__', '__contains__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__getstate__', '__gt__', '__hash__', '__init__', '__iter__', '__le__', '__len__', '__lt__', '__module__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__rmul__', '__setattr__', '__sizeof__', '__slots__', '__str__', '__subclasshook__', '_asdict', '_fields', '_make', '_replace', '_source', 'a', 'count', 'index']
>>> namedtuple('a', 'a a a', rename=True)(1, 2, 3) 
a(a=1, _1=2, _2=3)

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• Bitbucket: https://bitbucket.org/logilab/astroid/issue/242