False negative R0204 on async functions

[rudineirk]

Steps to reproduce

With async functions, pylint is returning false negative for variable type redefinition (R0204)

Some examples that cause the error:

async def test_a():
    data = [
        {'test': 1},
        {'test': 2},
    ]
    return data

async def test_b():
    data = {'test': 1}
    return data

class Test:
    async def test_a(self):
        data = [
            {'test': 1},
            {'test': 2},
        ]
        return data

    async def test_b(self):
        data = {'test': 1}
        return data

Current behavior

R:  7, 4: Redefinition of data type from list to dict (redefined-variable-type)

Expected behavior

no type redefinition messages

pylint --version output

pylint 1.6.4,
astroid 1.4.9
Python 3.5.2 (default, Sep 14 2016, 11:28:32)
[GCC 6.2.1 20160901 (Red Hat 6.2.1-1)]

[PCManticore]

redefined-variable-type is deprecated (actually moved into an extension, thus needing explicit activation). Please ignore it for now, since it has lots of edge cases.

[PCManticore]

Forgot to mention that this is in the latest code from the master branch, not yet released in the wild.