This fills in the TODOs for the unit, functional and
docs part of the API contributor guide.
Since we don't rely on the DocImpact tag in the commit
message for API changes (that tag results in a nova bug
and was meant mostly for making changes to docs external
to the nova repo, which is no longer the case), this
changes that section to just talk about the in-tree docs
that should be updated for API changes.
Change-Id: I9ca423c09185d2e3733357fd47aaba82d716eea4
Matt Riedemann
749f1ecbc5