Comment 9 for bug 1570509

Reviewed: https://review.openstack.org/315615
Committed: https://git.openstack.org/cgit/openstack/fuel-web/commit/?id=ab032632f749b05da3c6ddcd542460f406d20d02
Submitter: Jenkins
Branch: stable/mitaka

commit ab032632f749b05da3c6ddcd542460f406d20d02
Author: Vladimir Sharshov (warpc) <email address hidden>
Date: Mon Apr 18 19:26:32 2016 +0300

    Mark additional tasks info column as deferred

    Fields:

    - deployment_info;
    - cluster_settings;
    - network_settings.

    in sum take 150Mb for cluster with 200 nodes. Every task
    request will create heavy db select, so it will take
    a lot of memory, cpu load and dramatically decrease
    receiver performance.

    With this change this fields will be loaded only if
    Nailgun directly required them.

    Change-Id: I2417b0370914a0bd3a7f92e897826d9d86e76773
    Closes-Bug: #1570509
    (cherry picked from commit d2ec3c1e49e87958b71eca9f65dc1674f444f907)