Updated openstack/openstack
Project: openstack-dev/devstack  822b4cb2d16236dfdfd88bdde197baba466b2350

Use service role for neutron instead of admin

When creating the account for neutron to use in keystone,
give it a service role instead of an admin role so it isn't
overprivileged with the ability to create and delete tenants.
Also set the Neutron policy.json file to allow the Neutron
account to administer Neutron.

Closes-Bug: #1344463
Change-Id: I86b15cfcffe549654c28f425c2bcf99403ac10bc