Comment 2 for bug 1694792

Reviewed: https://review.openstack.org/469625
Committed: https://git.openstack.org/cgit/openstack/os-traits/commit/?id=789ce955eac04adb71ec5f2bc4890dd8c86c7ceb
Submitter: Jenkins
Branch: master

commit 789ce955eac04adb71ec5f2bc4890dd8c86c7ceb
Author: Chris Dent <email address hidden>
Date: Wed May 31 18:56:44 2017 +0000

    Correctly recurse os_traits packages

    When walk_packages is called, unless a prefix is provided, it is
    easy to escape the os_traits package and start walking other
    packages. If there is a top-level 'tests' package somewhere in the
    python path, this can then lead to importing all sorts of things,
    some which rely on the environment having certain characteristics
    and fail the import without that, some which will change the
    environment.

    Neither of these things are good. Nor do we want to be walking
    packages all over the place. By providing a prefix we stay within
    the os_traits package as desired.

    Change-Id: Icde41191e39317ff5a031fff9ece0f05f1e0b4bc
    Closes-Bug: #1694792