Comment 3 for bug 1506041

Reviewed: https://review.openstack.org/249106
Committed: https://git.openstack.org/cgit/openstack/fuel-octane/commit/?id=9acebae050b87629e5e4840bb8c36812877fc249
Submitter: Jenkins
Branch: master

commit 9acebae050b87629e5e4840bb8c36812877fc249
Author: Oleg Gelbukh <email address hidden>
Date: Mon Nov 23 22:18:50 2015 +0000

    Use node util functions to manage upgrade_levels

    Replace upgrade_levels set logic with call to node util function
    'add_compute_upgrade_levels'.
    Add 'remove_compute_upgrade_levels' operation for every node to
    'cleanup' command.

    Closes-bug: 1506041
    Change-Id: Iae6223c5b4b0ba78519f76cb86aba2c9e1b90517