Comment 4 for bug 1269686

Reviewed: https://review.openstack.org/72681
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=d2b9b90777abe073b59cd8a4a7279f7dc3e18d00
Submitter: Jenkins
Branch: master

commit d2b9b90777abe073b59cd8a4a7279f7dc3e18d00
Author: Pavlo Shchelokovskyy <email address hidden>
Date: Mon Feb 3 16:04:06 2014 +0200

    Add handle_update to VolumeAttachment

    Updates for volume attachments were handled in UpdateReplace manner,
    which fails when in need to attach new volume to the same mount
    (or attach the same volume to different mount on the same server,
    or attaching the same volume to different server).

    This patch makes all properties of VolumeAttachment
    to be update_allowed, adds necessary handle_update logic
    and fixes VolumeDetachTask to reliably detach old volume
    so that new one can be immediately attached.

    Closes-Bug: #1269686
    Closes-Bug: #1251439
    Change-Id: I0aee64036bf8125f76e7f427716412a326ff5eef