Comment 9 for bug 1517763

Reviewed: https://review.openstack.org/304446
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=7e970a1da65431655179b3bba084f4a63fdae959
Submitter: Jenkins
Branch: stable/liberty

commit 7e970a1da65431655179b3bba084f4a63fdae959
Author: Michał Dulko <email address hidden>
Date: Fri Nov 20 12:36:22 2015 +0100

    Eager load columns in volume_get_active_by_window

    All other volume-related methods in db.sqlalchemy.api are eager loading
    volume_metadata, volume_admin_metadata (if admin), volume_type,
    volume_attachment and consistencygroup. volume_get_active_by_window
    wasn't, causing fails because of SQLAlchemy Session being closed when
    trying to lazy load volume_metadata. This commit adds missing
    options(joinedload()) to this query.

    Change-Id: I33ec89d7f1f43aae6010aaa6e12951b7c522b8f0
    Closes-Bug: 1517763
    Related-Bug: 1501838
    (cherry picked from commit 586727cef755abeb3360f176782c1b1dd680d318)