This patch adds a release note, documentation and an automated
determination of whether the Horizon panel for FWaaS should be
enabled.
Re-Implementation-Of: https://review.openstack.org/#/c/275894/9
Depends-On: I682171333328e42895ec1a4d2d0cc5d2b2fcdcd9
Depends-On: Ic046cc9815f7b9c86a52fd75e7c796ecacc9e083
Change-Id: Iabfaa3d755bc2badae85325e3c6d477f4f2d620c
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>