Fix issue with annotated class constants

[cdce8p]

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Description

This MR fixes an issue introduced with #4185. The error occurs if a class var with an annotation subscript, that is an attribute, is parsed. See example below

import typing
from typing import List

import custom_path


class Custom:
    var: List[int]
    var2: typing.List[int]  # error

    var3: custom_path.MyOtherClass  # works

A workaround, until a new version is released, would be to not use attribute access for class variable annotations with subscript. Instead import the name directly, eg. from typing import List.

Type of Changes

	Type
✓	🐛 Bug fix

Related Issue

Closes #4264

[coveralls]

Coverage increased (+0.005%) to 91.458% when pulling 4117777 on cdce8p:fix-annotated-class-constants into 245feab on PyCQA:master.