This patch updates default policy-in-code rules in horizon based on
nova/neutron/glance RC deliverables. It doesn't update policy
rules for cinder and keystone as I have found no changes in their
policy rules. Horizon needs to update default policy-in-code rules
for all backend services before releasing the horizon[1].
[1] https://docs.openstack.org/horizon/latest/contributor/policies/releasing.html#things-to-do-before-releasing
Change-Id: Ia636b32d0eeec9a4d399fcdbb4d4db1aeaa4fdab