The neutron policy file is out of date. This patch updates it to match
neutron 11.0.0.0rc1. My motivation is to bring in trunk policies. But it
seems to me that if I start editing neutron_policy.json I better
synchronize the whole file from the neutron repo.
Change-Id: I976a0517559dd44f865de0528c4cf96e29340647
Partially-Implements: blueprint neutron-trunk-ui
Related-Change: Ie866f140fd4e5537ff0d757304ab5279f0cf0a79