Comment 2 for bug 1794824

Reviewed: https://review.openstack.org/608658
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=73c3cd41813606cd715c9193d825d64dcf2c3b40
Submitter: Zuul
Branch: master

commit 73c3cd41813606cd715c9193d825d64dcf2c3b40
Author: Martin André <email address hidden>
Date: Mon Oct 8 14:26:18 2018 +0200

    Fix update tasks for openshift

    While introducing the openshift-node service in 7373adc72e, some code
    was moved around and that broke the OpenShift external_deploy_task
    playbook in the case of a stack update due to undefined ansible
    variable.

    Rename the new_masters var into new_master_nodes and introduce the
    has_new_nodes boolean var that indicates there is at least one new node
    in the deployment.

    Related-Bug: 1794824

    Change-Id: I2f386b5507836deda0816616dd7add8a0b53dfd3