Update latest oslo.setup.

Change-Id: If3d397a1a33e14912abb1f7c94790640fe255d3a
Explain why the give methods are whitelisted.

In order to aid mine (and likely others) understanding of this
code it seems to make sense to document what these special whitelisted
attributes are.

Change-Id: I1c11484fc74e898df5d25ab94ed0cdb288accd67
Merge "Update latest oslo.setup."
Merge "Explain why the give methods are whitelisted."
Merge remote-tracking branch 'm_src_repo/master' into build-temp