Drop collections.Iterable in favor of collections.abc.Iterable
Drop collections.Iterable in favor of collections.abc.Iterable

Python3 has deprecated (and recently dropped) collections.Iterable in
favor of using the collections.abc module. This change fixes the import.

Closes-Bug: #1966442
Change-Id: I76ed972890a2fe0bedebd0364276590d5aa90f29

openstack/os-win