Comment 2 for bug 1641142

Reviewed: https://review.openstack.org/396712
Committed: https://git.openstack.org/cgit/openstack/tripleo-common/commit/?id=fbc435ce167eae2c6ac1070be47ad9065561855b
Submitter: Jenkins
Branch: master

commit fbc435ce167eae2c6ac1070be47ad9065561855b
Author: Jiri Stransky <email address hidden>
Date: Fri Nov 11 16:46:28 2016 +0100

    Only use parameter_defaults for scaling down

    We were using parameters for scaling down but parameter_defaults for
    scaling up. The old parameters from scale-down still persisted in the
    stack and took precedence over the scaled-up parameter_defaults, so the
    scaled-up values didn't propagate.

    We already update parameter_defaults in the deployment plan in that same
    method, so all we need to do is remove the 'parameters' part.

    Change-Id: I90a195a66b15c7c9057bfb415b6a730bbd9a939c
    Closes-Bug: #1641142