Change Ic3c555226a220efd9b0f27edffccf6c4c95c2747 introduced some
validation for the 'openstack server group create --policy' command.
Call this out in the release notes.
Change-Id: I7e00851a03470364db00f0f114fc724b0f686b72
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>
(cherry picked from commit bb15b29190)