Updated openstack/openstack
Project: openstack/keystone  3c03e64147e0f449d56be02d68b87f3d50d6e103

Mark the trust kvs backend deprecated, for removal in Kilo

Although the kvs.Base was marked as deprecated, the individual
backends were not.  This marks the kvs trust backend.

Partially-implements: bp deprecated-as-of-juno

Change-Id: I8b9b08ff7eefa6ad00db791c7077ddca5853ac6b