During the cycle reno was updated to include "deprecations" section. We
should use this one instead of "upgrades" to add release notes about
deprecations of features or config options.
This commit moves deprecation relase notes added during the cycle to
this section.
Change-Id: I7f1a868215fc7410b44481e3434253fb8157f321
This adds release notes for changes up to the Mitaka-1
milestone for reno release note generation.
Change-Id: I8cd65b41994631d96c5d4cf4c0531a3c0f74149f