Comment 5 for bug 1570983

Reviewed: https://review.openstack.org/303692
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=fef94d0d7366576313883d9cfd59d775ea9e9907
Submitter: Jenkins
Branch: master

commit fef94d0d7366576313883d9cfd59d775ea9e9907
Author: Crag Wolfe <email address hidden>
Date: Sat Apr 9 02:51:45 2016 -0400

    De-duplicate raw_template.files

    Save space in the db by allowing templates (especially nested
    templates) to reference the same template files dictionary objects,
    now stored in the table raw_template_files. Also, cache template files
    per heat-engine process as a RAM/performance optimization.

    Also, begin to allow for future rolling upgrades with
    oslo.versionedobjects.

    Change-Id: I1842ea6ba6773a135b1007b793a5f0884417747d
    Closes-Bug: 1570983