build: allow inner scopes to redefined outer names

It becomes quite hard not to do this in Django, because a lot of
the imports share similar names to local symbol names.

Fixes: GREG-14

.pylintrc

@@ -13,6 +13,7 @@ disable=
     missing-function-docstring,
     missing-module-docstring,
     no-self-use,
+    redefined-outer-name,
     too-few-public-methods,
     too-many-ancestors,
     unused-argument,