Inject project into the acl_parameters.

We want parameters to be free-form, but all of them are always for
a project and we always know the project, so I think it's a sensible
thing to always have available.

Change-Id: Id3d963d78b6a734771af0047dd7b260aa8ecb60b
Reviewed-on: https://review.openstack.org/23952
Reviewed-by: Anita Kuno <akuno@lavabit.com>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Approved: James E. Blair <corvus@inaugust.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins