Updated yaml to point to new directory for identity-api v2.0 pom file and add api v3 book

bug: #1194886

Change-Id: I965a61aa361df56e2683cf362a8c5e8d542be0cc
author: diane fleming
Reviewed-on: https://review.openstack.org/34904
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