Comment 2 for bug 1706418

Reviewed: https://review.openstack.org/487224
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=9d161f6922c48779cfd2356726a5449ccb253229
Submitter: Jenkins
Branch: master

commit 9d161f6922c48779cfd2356726a5449ccb253229
Author: John L. Villalovos <email address hidden>
Date: Tue Jul 25 14:33:29 2017 -0700

    grenade: For multi-node grenade, do not upgrade nova

    Multi-node grenade jobs will fail if we upgrade nova as the minimum
    required API for nova to communicate with ironic was upgraded.

    Our goal for multi-node grenade is to test rolling upgrades. The
    scenario we envision for rolling upgrades to be done is:

     1) Upgrade ironic-conductor services one by one. This means old
        ironic-api services communicating with new and old
        ironic-conductor services. This is what the multi-node grenade job
        tests.
     2) Upgrade ironic-api services.
     3) Upgrade nova

    In this upgrade procedure we should not be running updated nova with
    old ironic-api services. This patch fixes that.

    Closes-Bug: #1706418
    Change-Id: I85c607ae7d031e4cabcb505915aca7e88df166aa